Document:

<PAGE>

                                                                    EXHIBIT 10.6
                                                                    ------------

                       GUARANTEE AND SECURITY AGREEMENT

                                  dated as of

                               November 8, 2001

                                     among

                                NAVISITE, INC.

                          THE GUARANTORS PARTY HERETO

                                      and

                    COMPAQ FINANCIAL SERVICES CORPORATION,
                         as Collateral Representative
<PAGE>

                               TABLE OF CONTENTS
                                ______________

<TABLE>
<CAPTION>
                                                                                       Page
                                                                                       ----
     <S>                                                                               <C>
     Section 1.  Definitions...........................................................   1
     Section 2.  Guarantees by Guarantors..............................................   6
     Section 3.  Grant of Transaction Liens............................................   8
     Section 4.  General Representations and Warranties................................  10
     Section 5.  Further Assurances; General Covenants.................................  12
     Section 6.  Investment Property...................................................  14
     Section 7.  Collateral Accounts...................................................  15
     Section 8.  Remedies upon Event of Default........................................  16
     Section 9.  Application of Proceeds...............................................  17
     Section 10. Fees and Expenses; Indemnification...................................   18
     Section 11. Authority to Administer Collateral...................................   19
     Section 12. Limitation on Duty in Respect of Collateral..........................   20
     Section 13. General Provisions Concerning the Collateral Representative..........   20
     Section 14. Termination of Transaction Liens; Release of Collateral..............   22
     Section 15. Additional Guarantors and Lien Grantors..............................   22
     Section 16. Notices..............................................................   23
     Section 17. No Implied Waivers; Remedies Not Exclusive...........................   24
     Section 18. Successors and Assigns...............................................   24
     Section 19. Amendments and Waivers...............................................   24
     Section 20. Choice of Law........................................................   24
     Section 21. Waiver of Jury Trial.................................................   24
     Section 22. Severability.........................................................   25
</TABLE>

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                                                                            Page
                                                                            ----

SCHEDULES:
---------

    Schedule 1  Equity Interests in Subsidiaries and Affiliates Owned by
                Original Lien Grantors

EXHIBITS:
--------

    Exhibit A   Security Agreement Supplement

    Exhibit B   Perfection Certificate

    Exhibit C   Issuer Control Agreement

                                      ii
<PAGE>

                       GUARANTEE AND SECURITY AGREEMENT

         AGREEMENT dated as of November 8, 2001 among NAVISITE, INC., the
GUARANTORS party hereto and COMPAQ FINANCIAL SERVICES CORPORATION, as Collateral
Representative.

         WHEREAS, the Company is entering into the Note Purchase Agreement (as
this and other capitalized terms are defined in Section 1 hereof), pursuant to
which the Company intends to issue the Notes to the Purchasers;

         WHEREAS, the Company is willing to secure its obligations under the
Notes and the Note Purchase Agreement by granting Liens on its assets to the
Collateral Representative as provided in the Security Documents;

         WHEREAS, the Company is willing to cause each of its Subsidiaries to
guarantee the foregoing obligations of the Company and to secure its guarantee
thereof by granting Liens on its assets to the Collateral Representative as
provided in the Security Documents;

         WHEREAS, the Purchasers are not willing to purchase the Notes unless
(i) the foregoing obligations of the Company are secured and guaranteed as
described above and (ii) each guarantee thereof is secured by Liens on assets of
the relevant Guarantor as provided in the Security Documents;

         NOW, THEREFORE, in consideration of the foregoing and other good and
valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereto agree as follows:

         Section 1.  Definitions.

         (a) Terms Defined in Note Purchase Agreement. Terms defined in the Note
Purchase Agreement and not otherwise defined in subsection (b) or (c) of this
Section have, as used herein, the respective meanings provided for therein.

         (b) Terms Defined in UCC. As used herein, each of the following terms
has the meaning specified in the UCC:

Term                                                                   UCC
----                                                                   ---
Account                                                                9-102
Authenticate                                                           9-102
Certificated Security                                                  8-102
Chattel Paper                                                          9-102
Document                                                               9-102
<PAGE>

Equipment                                                            9-102
Financial Asset                                                      8-102 & 103
General Intangibles                                                  9-102
Instrument                                                           9-102
Inventory                                                            9-102
Investment Property                                                  9-102
Payment Intangible                                                   9-102
Record                                                               9-102
Securities Intermediary                                              8-102
Security                                                             8-102 & 103
Supporting Obligations                                               9-102
Uncertificated Security                                              8-102

          (c) Additional Definitions. The following additional terms, as used
herein, have the following meanings:

          "Active Foreign Subsidiary" means any Foreign Subsidiary that is not a
Dormant Foreign Subsidiary.

          "Article 9" means Article 9 of the Uniform Commercial Code as set
forth in the 1998 Official Text thereof; provided that, when used with respect
to any jurisdiction on or after the date when such Article 9 (with or without
local changes therein) first becomes effective in such jurisdiction, " Article
9" refers to Article 9 as in effect in such jurisdiction from time to time.

          "Collateral" means all property, whether now owned or hereafter
acquired, on which a Lien is granted or purports to be granted to the Collateral
Representative pursuant to the Security Documents. When used with respect to a
specific Lien Grantor, the term "Collateral" means all its property on which
such a Lien is granted or purports to be granted.

          "Collateral Account" has the meaning specified in Section 7.

          "Collateral Representative" means Compaq Financial Services
Corporation, a Delaware corporation, in its capacity as representative of the
Secured Parties under the Security Documents, and its successors in such
capacity.

          "Company" means NaviSite, Inc., a Delaware corporation.

          "Dormant Foreign Subsidiary" means, at any time, any Foreign
Subsidiary that at such time (i) is dormant or conducts no business, (ii) has
assets

                                       2
<PAGE>

with a fair market value of less than $100,000 or (iii) has revenues of less
than $100,000 during its most recently ended fiscal year.

          "Equity Interest" means (i) in the case of a corporation, any shares
of its capital stock, (ii) in the case of a limited liability company, any
membership interest therein, (iii) in the case of a partnership, any partnership
interest (whether general or limited) therein, (iv) in the case of any other
business entity, any participation or other interest in the equity or profits
thereof or (v) any warrant, option or other right to acquire any Equity Interest
described in this definition.

          "Foreign Subsidiary" means a Subsidiary (which may be a corporation,
limited liability company, partnership or other legal entity) organized under
the laws of a jurisdiction outside the United States, and conducting
substantially all its operations outside the United States, other than any such
entity that is (whether as a matter of law, pursuant to an election by such
entity or otherwise) treated as a partnership in which any Lien Grantor is a
partner or as a branch of any Lien Grantor for United States income tax
purposes.

          "Guarantors" means each Subsidiary listed on the signature pages
hereof under the caption "Guarantors" and each Subsidiary that shall, at any
time after the date hereof, become a "Guarantor" pursuant to Section 15.

          "Issuer Control Agreement" means an Issuer Control Agreement
substantially in the form of Exhibit C (with any changes that the Collateral
Representative shall have approved).

          "Lien Grantors" means the Company and the Guarantors.

          "LLC Interest" means a membership interest or similar interest in a
limited liability company.

          "Note" has the meaning specified in the Note Purchase Agreement.

          "Note Documents" means the Note Purchase Agreement, the Notes, the
Investor Rights Agreement Amendment and the Security Documents and any documents
or agreements contemplated therein.

          "Note Purchase Agreement" means the Note Purchase Agreement dated
October 29, 2001 among the Company and the Purchasers named therein.

          "Opinion of Counsel" means a written opinion of legal counsel (who may
be counsel to a Lien Grantor or other counsel, in either case reasonably
acceptable

                                       3
<PAGE>

to the Collateral Representative) addressed and delivered to the Collateral
Representative.

          "Original Lien Grantor" means any Lien Grantor that grants a Lien on
any of its assets hereunder on the Effective Date.

          "own" refers to the possession of sufficient rights in property to
grant a security interest therein as contemplated by UCC Section 9-203, and
"acquire" refers to the acquisition of any such rights.

          "Partnership Interest" means a partnership interest, whether general
or limited.

          "Perfection Certificate" means, with respect to any Lien Grantor, a
certificate substantially in the form of Exhibit B, completed and supplemented
with the schedules contemplated thereby to the satisfaction of the Collateral
Representative, and signed by an officer of such Lien Grantor.

          "Permitted Liens" means (i) the Transaction Liens and (ii) any other
Liens on the Collateral permitted to be created or assumed or to exist pursuant
to Section 6.02 of the Note Purchase Agreement.

          "Pledged", when used in conjunction with any type of asset, means at
any time an asset of such type that is included (or that creates rights that are
included) in the Collateral at such time. For example, "Pledged Equity Interest"
means an Equity Interest that is included in the Collateral at such time.

          "Post-Petition Interest" means any interest that accrues after the
commencement of any case, proceeding or other action relating to the bankruptcy,
insolvency or reorganization of the Company (or would accrue but for the
operation of applicable bankruptcy or insolvency laws), whether or not such
interest is allowed or allowable as a claim in any such proceeding.

          "Proceeds" means all proceeds of, and all other profits, products,
rents or receipts, in whatever form, arising from the collection, sale, lease,
exchange, assignment, licensing or other disposition of, or other realization
upon, any Collateral, including all claims of the relevant Lien Grantor against
third parties for loss of, damage to or destruction of, or for proceeds payable
under, or unearned premiums with respect to, policies of insurance in respect
of, any Collateral, and any condemnation or requisition payments with respect to
any Collateral.

          "Purchasers" has the meaning specified in the Note Purchase Agreement.

                                       4
<PAGE>

          "Related Parties" means, with respect to any specified Person, such
Person's Affiliates and the respective directors, officers, employees, agents
and advisors of such Person and its Affiliates.

          "Release Conditions" means the following condition for releasing all
the Secured Guarantees and terminating all the Transaction Liens: all Secured
Obligations shall have been paid in full.

          "Required Holders" means the holders of more than 50% of the aggregate
outstanding principal amount of the Notes.

          "Secured Agreement", when used with respect to any Secured Obligation,
refers collectively to each instrument, agreement or other document that sets
forth obligations of the Company, obligations of a guarantor and/or rights of
the holder with respect to such Secured Obligation.

          "Secured Guarantee" means, with respect to each Guarantor, its
guarantee of the Secured Obligations under Section 2 hereof or Section 1 of a
Security Agreement Supplement.

          "Secured Obligations" means all principal of all Notes outstanding
from time to time under the Note Purchase Agreement, all interest (including
Post-Petition Interest) on such Notes and all other amounts now or hereafter
payable by the Company pursuant to the Note Documents.

          "Secured Parties" means the holders from time to time of the Secured
Obligations.

          "Security Agreement Supplement" means a Security Agreement Supplement,
substantially in the form of Exhibit A, signed and delivered to the Collateral
Representative for the purpose of adding a Subsidiary as a party hereto pursuant
to Section 15 and/or adding additional property to the Collateral.

          "Security Documents" means this Agreement, the Security Agreement
Supplements and all other supplemental or additional security agreements,
control agreements, mortgages or similar instruments delivered pursuant to the
Note Documents.

          "Supporting Letter of Credit" means a letter of credit that supports
the payment or performance of one or more items included in the Collateral.

          "Transaction Liens" means the Liens granted by the Lien Grantors under
the Security Documents.

                                       5
<PAGE>

          "UCC" means the Uniform Commercial Code as in effect from time to time
in the State of New York; provided that, if perfection or the effect of
perfection or non-perfection or the priority of any Transaction Lien on any
Collateral is governed by the Uniform Commercial Code as in effect in a
jurisdiction other than New York, "UCC" means the Uniform Commercial Code as in
effect from time to time in such other jurisdiction for purposes of the
provisions hereof relating to such perfection, effect of perfection or
non-perfection or priority.

          (a) Terms Generally. The definitions of terms herein (including those
incorporated by reference to the UCC or to another document) apply equally to
the singular and plural forms of the terms defined. Whenever the context may
require, any pronoun includes the corresponding masculine, feminine and neuter
forms. The words "include", "includes" and "including" shall be deemed to be
followed by the phrase "without limitation". The word "will" shall be construed
to have the same meaning and effect as the word "shall". Unless the context
requires otherwise, (a) any definition of or reference to any agreement,
instrument or other document herein shall be construed as referring to such
agreement, instrument or other document as from time to time amended,
supplemented or otherwise modified (subject to any restrictions on such
amendments, supplements or modifications set forth herein), (b) any reference
herein to any Person shall be construed to include such Person's successors and
assigns, (c) the words "herein", "hereof" and "hereunder", and words of similar
import, shall be construed to refer to this Agreement in its entirety and not to
any particular provision hereof, (d) all references herein to Sections, Exhibits
and Schedules shall be construed to refer to Sections of, and Exhibits and
Schedules to, this Agreement and (e) the word "property" shall be construed to
refer to any and all tangible and intangible assets and properties, including
cash, securities, accounts and contract rights.

          Section 2.  Guarantees by Guarantors.

          (a) Secured Guarantees. Each Guarantor unconditionally guarantees the
full and punctual payment of each Secured Obligation when due (whether at stated
maturity, upon acceleration or otherwise). If the Company fails to pay any
Secured Obligation punctually when due, each Guarantor agrees that it will
forthwith on demand pay the amount not so paid at the place and in the manner
specified in the relevant Secured Agreement.

          (b) Secured Guarantees Unconditional. The obligations of each
Guarantor under its Secured Guarantee shall be unconditional and absolute and,
without limiting the generality of the foregoing, shall not be released,
discharged or otherwise affected by:

                                       6
<PAGE>

          (i)   any extension, renewal, settlement, compromise, waiver or
     release in respect of any obligation of the Company, any other Guarantor or
     any other Person under any Secured Agreement, by operation of law or
     otherwise;

          (ii)  any modification or amendment of or supplement to any Secured
     Agreement;

          (iii) any release, impairment, non-perfection or invalidity of any
     direct or indirect security for any obligation of the Company, any other
     Guarantor or any other Person under any Secured Agreement;

          (iv)  any change in the corporate existence, structure or ownership of
     the Company, any other Guarantor or any other Person or any of their
     respective subsidiaries, or any insolvency, bankruptcy, reorganization or
     other similar proceeding affecting the Company, any other Guarantor or any
     other Person or any of their assets or any resulting release or discharge
     of any obligation of the Company, any other Guarantor or any other Person
     under any Secured Agreement;

          (v)   the existence of any claim, set-off or other right that such
     Guarantor may have at any time against the Company, any other Guarantor,
     any Secured Party or any other Person, whether in connection with the Notes
     or any unrelated transactions, provided that nothing herein shall prevent
     the assertion of any such claim by separate suit or compulsory
     counterclaim;

          (vi)  any invalidity or unenforceability relating to or against the
     Company, any other Guarantor or any other Person for any reason of any
     Secured Agreement, or any provision of applicable law or regulation
     purporting to prohibit the payment of any Secured Obligation by the
     Company, any other Guarantor or any other Person; or

          (vii) any other act or omission to act or delay of any kind by the
     Company, any other Guarantor, any other party to any Secured Agreement, any
     Secured Party or any other Person, or any other circumstance whatsoever
     that might, but for the provisions of this clause (vii), constitute a legal
     or equitable discharge of or defense to any obligation of any Guarantor
     hereunder.

     (c)  Release of Secured Guarantees. (i) All the Secured Guarantees will
be released when all the Release Conditions are satisfied. If at any time any

                                       7
<PAGE>

payment of a Secured Obligation is rescinded or must be otherwise restored or
returned upon the insolvency or receivership of the Company or otherwise, the
Secured Guarantees shall be reinstated with respect thereto as though such
payment had been due but not made at such time.

         (ii) The Collateral Representative may release any Secured Guarantee
with the prior written consent of the Required Holders.

         (d)  Waiver by Guarantors. Each Guarantor irrevocably waives acceptance
hereof, presentment, demand, protest and any notice not provided for herein, as
well as any requirement that at any time any action be taken by any Person
against the Company, any other Guarantor or any other Person.

         (e)  Subrogation. A Guarantor that makes a payment with respect to a
Secured Obligation hereunder shall be subrogated to the rights of the payee
against the Company with respect to such payment; provided that no Guarantor
shall enforce any payment by way of subrogation against the Company, or by
reason of contribution against any other guarantor of such Secured Obligation,
until all the Release Conditions have been satisfied.

         (f)  Stay of Acceleration. If acceleration of the time for payment of
any Secured Obligation by the Company is stayed by reason of the insolvency or
receivership of the Company or otherwise, all Secured Obligations otherwise
subject to acceleration under the terms of any Secured Agreement shall
nonetheless be payable by the Guarantors hereunder forthwith on demand by the
Collateral Representative.

         (g)  Continuing Guarantee. Each Secured Guarantee is a continuing
guarantee, shall be binding on the relevant Guarantor and its successors and
assigns, and shall be enforceable by the Collateral Representative or the
Secured Parties. If all or part of any Secured Party's interest in any Secured
Obligation is assigned or otherwise transferred, the transferor's rights under
each Secured Guarantee, to the extent applicable to the obligation so
transferred, shall automatically be transferred with such obligation.

         (h)  Limitation on Obligations of Subsidiary Guarantor. The obligations
of each Subsidiary Guarantor under its Secured Guarantee shall be limited to an
aggregate amount equal to the largest amount that would not render such Secured
Guarantee subject to avoidance under Section 548 of the United States Bankruptcy
Code or any comparable provisions of applicable law.

          Section 3.  Grant of Transaction Liens.

                                       8
<PAGE>

          (a) The Company, in order to secure the Secured Obligations, and each
Guarantor listed on the signature pages hereof, in order to secure its Secured
Guarantee, grants to the Collateral Representative for the benefit of the
Secured Parties a continuing security interest in all the following property of
the Company or such Guarantor, as the case may be, whether now owned or existing
or hereafter acquired or arising and regardless of where located:

                  (i)    all Accounts;

                 (ii)    all Chattel Paper;

                (iii)    all Documents;

                 (iv)    all Equipment;

                  (v)    all General Intangibles (including any Equity Interests
         in other Persons that do not constitute Investment Property);

                 (vi)    all Instruments;

                (vii)    all Inventory;

               (viii)    all Investment Property;

                 (ix)    all books and records (including customer lists, credit
         files, computer programs, printouts and other computer materials and
         records) of such Original Lien Grantor pertaining to any of its
         Collateral;

                  (x)    such Original Lien Grantor's ownership interest in (1)
         its Collateral Accounts, (2) all Financial Assets credited to its
         Collateral Accounts from time to time and all Security Entitlements in
         respect thereof, (3) all cash held in its Collateral Accounts from time
         to time and (4) all other money in the possession of the Collateral
         Representative; and

                 (xi)    all Proceeds of the Collateral described in the
         foregoing clauses (i) through (x);

provided that the following property is excluded from the foregoing security
interests: (A) voting Equity Interests in any Active Foreign Subsidiary, to the
extent (but only to the extent) required to prevent the Collateral from
including more that 66% of all voting Equity Interests in such Foreign
Subsidiary and (B) voting Equity Interests in any Dormant Foreign Subsidiary.

                                       9
<PAGE>

          (b) With respect to each right to payment or performance included in
the Collateral from time to time, the Transaction Lien granted therein includes
a continuing security interest in (i) any Supporting Obligation that supports
such payment or performance and (ii) any Lien that (x) secures such right to
payment or performance or (y) secures any such Supporting Obligation.

          (c) The Transaction Liens are granted as security only and shall not
subject the Collateral Representative or any other Secured Party to, or transfer
or in any way affect or modify, any obligation or liability of any Lien Grantor
with respect to any of the Collateral or any transaction in connection
therewith.

          Section 4.  General Representations and Warranties. Each Original Lien
Grantor represents and warrants that:

          (a) Such Lien Grantor is a corporation duly organized, validly
existing and in good standing under the laws of the jurisdiction identified as
its jurisdiction of organization in its Perfection Certificate.

          (b) Schedule 1 lists all Equity Interests in Subsidiaries and
Affiliates owned by such Lien Grantor as of the Effective Date. Such Lien
Grantor holds all such Equity Interests directly (i.e., not through a
Subsidiary, a Securities Intermediary or any other Person).

          (c) Except as set forth on the Perfection Certificate of such Lien
Grantor, all Pledged Equity Interests owned by such Lien Grantor are owned by it
free and clear of any Lien other than (i) the Transaction Liens and (ii) any tax
liens, judgment liens and other Permitted Liens. All shares of capital stock
included in such Pledged Equity Interests (including shares of capital stock in
respect of which such Lien Grantor owns a Security Entitlement) have been duly
authorized and validly issued and are fully paid and non-assessable. None of
such Pledged Equity Interests is subject to any option to purchase or similar
right of any Person. Such Lien Grantor is not and will not become a party to or
otherwise bound by any agreement (except the Note Documents) which restricts in
any manner the rights of any present or future holder of any Pledged Equity
Interest with respect thereto.

          (d) Except as set forth on the Perfection Certificate of such Lien
Grantor, such Lien Grantor has good and marketable title to all its Collateral
(subject to exceptions that are, in the aggregate, not material), free and clear
of any Lien other than Permitted Liens.

                                       10
<PAGE>

          (e) Such Lien Grantor has not performed any acts that might prevent
the Collateral Representative from enforcing any of the provisions of the
Security Documents or that would limit the Collateral Representative in any such
enforcement. No financing statement, security agreement, mortgage or similar or
equivalent document or instrument covering all or part of the Collateral owned
by such Lien Grantor is on file or of record in any jurisdiction in which such
filing or recording would be effective to perfect or record a Lien on such
Collateral, except financing statements, mortgages or other similar or
equivalent documents with respect to Permitted Liens. After the Effective Date,
no Collateral owned by such Lien Grantor will be in the possession or under the
Control of any other Person having a claim thereto or security interest therein,
other than a Permitted Lien.

          (f) The Transaction Liens on all Collateral owned by such Lien Grantor
(i) have been validly created, (ii) will attach to each item of such Collateral
on the Effective Date (or, if such Lien Grantor first obtains rights thereto on
a later date, on such later date) and (iii) when so attached, will secure all
the Secured Obligations or such Lien Grantor's Secured Guarantee, as the case
may be.

          (g) Such Lien Grantor has delivered a Perfection Certificate to the
Collateral Representative. The information set forth therein is correct and
complete as of the Effective Date. Within 60 days after the Effective Date, such
Lien Grantor will furnish to the Collateral Representative a file search report
from each UCC filing office listed in its Perfection Certificate, showing the
filing made at such filing office to perfect the Transaction Liens on its
Collateral.

          (h) When UCC financing statements describing the Collateral as set
forth in Schedule 1 to such Lien Grantor's Perfection Certificate have been
filed in the offices specified in such Perfection Certificate, the Transaction
Liens will constitute perfected security interests in the Collateral owned by
such Lien Grantor to the extent that a security interest therein may be
perfected by filing pursuant to the UCC, prior to all Liens and rights of others
therein except Permitted Liens.

          (i) Such Lien Grantor has taken, and will continue to take, all
actions necessary under the UCC to perfect its interest in (i) any Accounts or
Chattel Paper purchased or otherwise acquired by it, as against its assignors
and creditors of its assignors and (ii) any Payment Intangibles or promissory
notes purchased or otherwise acquired by it, as against its assignors and
creditors of its assignors.

          (j) Such Lien Grantor's Collateral is insured as required by the Note
Purchase Agreement.

                                       11
<PAGE>

          (k) All of such Lien Grantor's Inventory has or will have been
produced in compliance, in all material respects, with the applicable
requirements of the Fair Labor Standards Act, as amended.

          Section 5.  Further Assurances; General Covenants. Each Lien Grantor
covenants as follows:

          (a) Such Lien Grantor will, from time to time, at the Company's
expense, execute, deliver, file and record any statement, assignment,
instrument, document, agreement or other paper and take any other action
(including any intellectual property filing and any filing of financing or
continuation statements under the UCC) that from time to time may be necessary
or desirable, or that the Collateral Representative may request, in order to:

                  (i)  create, preserve, perfect, confirm or validate the
         Transaction Liens on such Lien Grantor's Collateral;

                 (ii)  enable the Collateral Representative and the other
         Secured Parties to obtain the full benefits of the Security Documents;
         or

                (iii)  enable the Collateral Representative to exercise and
         enforce any of its rights, powers and remedies with respect to any of
         such Lien Grantor's Collateral.

         To the extent permitted by applicable law, such Lien Grantor authorizes
the Collateral Representative to execute and file such financing statements or
continuation statements without such Lien Grantor's signature appearing thereon.
Such Lien Grantor agrees that a carbon, photographic, photostatic or other
reproduction of this Agreement or of a financing statement is sufficient as a
financing statement. Such Lien Grantor constitutes the Collateral Representative
its attorney-in-fact to execute and file all intellectual property filings and
other filings required or so requested for the foregoing purposes, all acts of
such attorney being hereby ratified and confirmed; and such power, being coupled
with an interest, shall be irrevocable until all the Transaction Liens granted
by such Lien Grantor terminate pursuant to Section 14. The Company will pay the
costs of, or incidental to, any intellectual property filings and any recording
or filing of any financing or continuation statements or other documents
recorded or filed pursuant hereto in accordance with clause (ii) of the second
sentence of Section 9.01 of the Note Purchase Agreement.

         (b)    Such Lien Grantor will not (i) change its name or corporate
structure, (ii) change its location (determined as provided in UCC Section 9-
307) or (iii) become bound, as provided in UCC Section 9-203(d) or otherwise, by
a security

                                       12
<PAGE>

agreement entered into by another Person, unless it shall have given the
Collateral Representative prior notice thereof.

          (c) At least 30 days before it takes any action contemplated by
Section 5(b), such Lien Grantor will, at the Company's expense and at the
request of the Purchasers, cause to be delivered to the Collateral
Representative an Opinion of Counsel, in form and substance satisfactory to the
Collateral Representative, to the effect that (i) all financing statements and
amendments or supplements thereto, continuation statements and other documents
required to be filed or recorded in order to perfect and protect the Transaction
Liens against all creditors of and purchasers from such Lien Grantor after it
takes such action (except any continuation statements specified in such Opinion
of Counsel that are to be filed more than six months after the date thereof)
have been filed or recorded in each office necessary for such purpose, (ii) all
fees and taxes, if any, payable in connection with such filings or recordations
have been paid in full and (iii) except as otherwise agreed by the Required
Holders, such action will not adversely affect the perfection or priority of the
Transaction Lien on any Collateral to be owned by such Lien Grantor after it
takes such action or the accuracy of such Lien Grantor's representations and
warranties herein relating to such Collateral.

          (d) If any Collateral is located on premises leased by a Lien Grantor
as lessee, such Lien Grantor shall, within 60 days of the date hereof in the
case of leases in existence on the date hereof, and substantially simultaneously
with the execution and delivery of such lease, in the case of leases hereafter
entered into, use its reasonable efforts to secure from the landlord a waiver of
contractual and statutory landlord's liens, an agreement to permit access to and
removal of Collateral and other customary matters, all pursuant to an instrument
in form and substance satisfactory to the Collateral Representative.

          (e) Such Lien Grantor will not sell, lease, exchange, assign or
otherwise dispose of, or grant any option with respect to, any of its
Collateral; provided that such Lien Grantor may do any of the foregoing unless
(i) doing so would violate a covenant in the Note Purchase Agreement or (ii) an
Event of Default shall have occurred and be continuing and the Collateral
Representative shall have notified such Lien Grantor that its right to do so is
terminated, suspended or otherwise limited. Concurrently with any sale, lease or
other disposition (except a sale or disposition to another Lien Grantor or a
lease) permitted by the foregoing proviso, the Transaction Liens on the assets
sold or disposed of (but not in any Proceeds arising from such sale or
disposition) will cease immediately without any action by the Collateral
Representative or any other Secured Party. The Collateral Representative will,
at the Company's expense, execute and deliver to the relevant Lien Grantor such
documents as such Lien Grantor shall reasonably request to

                                       13
<PAGE>

evidence the fact that any asset so sold or disposed of is no longer subject to
a Transaction Lien.

          (f) Such Lien Grantor will, promptly upon request, provide to the
Collateral Representative all information and evidence concerning such Lien
Grantor's Collateral that the Collateral Representative may reasonably request
from time to time to enable it to enforce the provisions of the Security
Documents.

         Section 6.   Investment Property. Each Lien Grantor represents,
warrants and covenants as follows:

          (a) Certificated Securities. On the Effective Date (in the case of an
Original Lien Grantor) or the date on which it signs and delivers its first
Security Agreement Supplement (in the case of any other Lien Grantor), such Lien
Grantor will deliver to the Collateral Representative as Collateral hereunder
all certificates representing Pledged Certificated Securities then owned by such
Lien Grantor. Thereafter, whenever such Lien Grantor acquires any other
certificate representing a Pledged Certificated Security, such Lien Grantor will
immediately deliver such certificate to the Collateral Representative as
Collateral hereunder.

          (b) Uncertificated Securities. On the Effective Date (in the case of
an Original Lien Grantor) or the date on which it signs and delivers its first
Security Agreement Supplement (in the case of any other Lien Grantor), such Lien
Grantor will enter into (and cause the relevant issuer to enter into) an Issuer
Control Agreement in respect of each Pledged Uncertificated Security then owned
by such Lien Grantor and deliver such Issuer Control Agreement to the Collateral
Representative (which shall enter into the same). Thereafter, whenever such Lien
Grantor acquires any other Pledged Uncertificated Security, such Lien Grantor
will enter into (and cause the relevant issuer to enter into) an Issuer Control
Agreement in respect of such Pledged Uncertificated Security and deliver such
Issuer Control Agreement to the Collateral Representative (which shall enter
into the same).

          (c) Delivery of Pledged Certificates. All Pledged Certificates, when
delivered to the Collateral Representative, will be in suitable form for
transfer by delivery, or accompanied by duly executed instruments of transfer or
assignment in blank, with signatures appropriately guaranteed, all in form and
substance satisfactory to the Collateral Representative.

          (d) Foreign Subsidiaries. A Lien Grantor will not be obligated to
comply with the provisions of this Section at any time with respect to any
voting Equity Interest in a Foreign Subsidiary if and to the extent (but only to
the extent)

                                       14
<PAGE>

that such voting Equity Interest is excluded from the Transaction Liens at such
time pursuant to the proviso at the end of Section 3(a) and/or the comparable
provisions of one or more Security Agreement Supplements.

          Section 7. Collateral Accounts. (a) If and when required for purposes
hereof, the Collateral Representative will establish with respect to each Lien
Grantor an account (its "Collateral Account"), in the name and under the
exclusive control of the Collateral Representative, into which all amounts owned
by such Lien Grantor that are to be deposited therein pursuant to the Note
Documents shall be deposited from time to time. Each Cash Collateral Account
will be operated as provided in this Section.

          (b) The Collateral Representative shall deposit the following amounts,
as and when received by it, in the Collateral Account of the applicable Lien
Grantor:

                  (i)  each amount required by the Note Documents to be
          deposited therein, including, without limitation, all proceeds
          specified in Section 5.04(d) of the Note Purchase Agreement; and

                 (ii)  each amount realized or otherwise received by the
          Collateral Representative with respect to assets of such Lien Grantor
          upon any exercise of remedies pursuant to any Security Document.

          (c) Unless (x) an Event of Default shall have occurred and be
continuing and the Required Holders shall have instructed the Collateral
Representative to stop withdrawing amounts from the Collateral Account pursuant
to this subsection or (y) the maturity of the Notes shall have been accelerated
pursuant to Article 7 of the Note Purchase Agreement, the Collateral
Representative shall withdraw amounts deposited in the Collateral Account in
accordance with Section 5.04(d) of the Note Purchase Agreement and apply them to
pay, or reimburse the Company and its Subsidiaries for paying, the cost of
repairing, restoring or replacing the affected property to the extent that the
Company has certified, no less than 5 Business Days prior to the date of such
withdrawal, that (i) it and its Subsidiaries intend to apply all or any portion
of such amounts to pay the cost of repairing, restoring or replacing the
affected property and (ii) if such property is to be replaced, the property
acquired to replace it will be included in the Collateral at least to the extent
that the property to be replaced was included therein;

          (d) Funds held in any Collateral Account may, until withdrawn, be
invested and reinvested in such Temporary Cash Investments as the relevant Lien
Grantor shall request from time to time; provided that, if an Event of Default
shall

                                       15
<PAGE>

have occurred and be continuing, the Collateral Representative may select such
Temporary Cash Investments.

          (e)  If an Event of Default shall have occurred and be continuing, the
Collateral Representative may withdraw any amounts held therein and apply such
amounts as provided in Section 9.

          Section 8. Remedies upon Event of Default. (a) If an Event of Default
shall have occurred and be continuing, the Collateral Representative may
exercise (or cause its sub-agents to exercise) any or all of the remedies
available to it (or to such sub-agents) under the Security Documents.

          (b)  Without limiting the generality of the foregoing, if an Event of
Default shall have occurred and be continuing, the Collateral Representative may
exercise on behalf of the Secured Parties all the rights of a secured party
under the UCC (whether or not in effect in the jurisdiction where such rights
are exercised) with respect to any Collateral and, in addition, the Collateral
Representative may, without being required to give any notice, except as herein
provided or as may be required by mandatory provisions of law, withdraw all cash
held in the Collateral Accounts and apply such cash as provided in Section 9
and, if there shall be no such cash or if such cash shall be insufficient to pay
all the Secured Obligations in full, sell, lease, license or otherwise dispose
of the Collateral or any part thereof. Notice of any such sale or other
disposition shall be given to the relevant Lien Grantor(s) as required by
Section 11. The foregoing provisions of this subsection shall apply to Real
Property Collateral only to the extent permitted by applicable law and the
provisions of any applicable Mortgage or other document.

          (c)  Without limiting the generality of the foregoing, if an Event of
Default shall have occurred and be continuing:

               (i)  the Collateral Representative may license or sublicense,
          whether general, special or otherwise, and whether on an exclusive or
          non-exclusive basis, any Pledged intellectual property (including any
          Pledged Recordable Intellectual Property) throughout the world for
          such term or terms, on such conditions and in such manner as the
          Collateral Representative shall in its sole discretion determine;
          provided that such licenses or sublicenses do not conflict with any
          existing license made available to the Collateral Representative;

               (ii) the Collateral Representative may (without assuming any
          obligation or liability thereunder), at any time and from time to
          time, in its sole and reasonable discretion, enforce (and shall have
          the exclusive right to enforce) against any licensee or sublicensee
          all rights and remedies of

                                       16
<PAGE>

          any Lien Grantor in, to and under any of its Pledged intellectual
          property and take or refrain from taking any action under any thereof,
          and each Lien Grantor releases the Collateral Representative and each
          other Secured Party from liability for, and agrees to hold the
          Collateral Representative and each other Secured Party free and
          harmless from and against any claims and expenses arising out of, any
          lawful action so taken or omitted to be taken with respect thereto,
          except for claims and expenses arising from the Collateral
          Representative's or such Secured Party's gross negligence or willful
          misconduct; and

               (iii) upon request by the Collateral Representative (which shall
          not be construed as implying any limitation on its rights or powers),
          each Lien Grantor will execute and deliver to the Collateral
          Representative a power of attorney, in form and substance satisfactory
          to the Collateral Representative, for the implementation of any sale,
          lease, license or other disposition of any of such Lien Grantor's
          Pledged intellectual property or any action related thereto. In
          connection with any such disposition, but subject to any
          confidentiality restrictions imposed on such Lien Grantor in any
          license or similar agreement, such Lien Grantor will supply to the
          Collateral Representative its know-how and expertise relating to the
          relevant intellectual property or the products or services made or
          rendered in connection with such intellectual property, and its
          customer lists and other records relating to such intellectual
          property and to the distribution of said products or services.

          Section 9. Application of Proceeds. (a) If an Event of Default shall
have occurred and be continuing, the Collateral Representative may apply (i) any
cash held in the Collateral Accounts and (ii) the proceeds of any sale or other
disposition of all or any part of the Collateral, in the following order of
priorities:

               first, to pay the expenses of such sale or other disposition,
          including reasonable compensation to agents of and counsel for the
          Collateral Representative, and all expenses, liabilities and advances
          incurred or made by the Collateral Representative in connection with
          the Security Documents;

               second, to pay the unpaid principal of the Secured Obligations
          ratably until payment in full of the principal of all Secured
          Obligations shall have been made;

               third, to pay ratably all interest (including Post-Petition
          Interest) on the Secured Obligations until payment in full of all such
          interest shall have been made;

                                       17
<PAGE>

               fourth, to pay all other Secured Obligations ratably until
          payment in full of all such other Secured Obligations shall have been
          made; and

               finally, to pay to the relevant Lien Grantor, or as a court of
          competent jurisdiction may direct, any surplus then remaining from the
          proceeds of the Collateral owned by it;

provided that Collateral owned by a Guarantor and any proceeds thereof shall be
applied pursuant to the foregoing clauses first, second, third and fourth only
to the extent permitted by the limitation in Section 2(h). The Collateral
Representative may make such distributions hereunder in cash or in kind or, on a
ratable basis, in any combination thereof.

          (b)  In making the payments and allocations required by this Section,
the Collateral Representative may rely upon information supplied to it by the
Secured Parties. All distributions made by the Collateral Representative
pursuant to this Section shall be final (except in the event of manifest error)
and the Collateral Representative shall have no duty to inquire as to the
application by any Secured Party of any amount distributed to it.

          Section 10. Fees and Expenses; Indemnification. (a) The Company will
forthwith upon demand pay to the Collateral Representative:

               (i)    the amount of any taxes that the Collateral Representative
          may have been required to pay by reason of the Transaction Liens or to
          free any Collateral from any other Lien thereon;

               (ii)   the amount of any and all reasonable out-of-pocket
          expenses, including transfer taxes and reasonable fees and expenses of
          counsel and other experts, that the Collateral Representative may
          incur in connection with (x) the administration or enforcement of the
          Security Documents, including such expenses as are incurred to
          preserve the value of the Collateral or the validity, perfection, rank
          or value of any Transaction Lien, (y) the collection, sale or other
          disposition of any Collateral or (z) the exercise by the Collateral
          Representative of any of its rights or powers under the Security
          Documents; and

               (iii)  the amount required to indemnify the Collateral
          Representative for, or hold it harmless and defend it against, any
          loss, liability or expense (including the reasonable fees and expenses
          of its counsel and any experts or sub-agents appointed by it
          hereunder) incurred or suffered by the Collateral Representative in
          connection with the

                                       18
<PAGE>

          Security Documents, except to the extent that such loss, liability or
          expense arises from the Collateral Representative's gross negligence
          or willful misconduct or a breach of any duty that the Collateral
          Representative has under this Agreement (after giving effect to
          Sections 12 and 13).

Any such amount not paid to the Collateral Representative in accordance with the
Security Documents will bear interest for each day thereafter until paid at a
rate of 14% per annum.

          (b) If any transfer tax, documentary stamp tax or other tax is payable
in connection with any transfer or other transaction provided for in the
Security Documents, the Company will pay such tax and provide any required tax
stamps to the Collateral Representative or as otherwise required by law.

          Section 11.  Authority to Administer Collateral. Each Lien Grantor
irrevocably appoints the Collateral Representative its true and lawful attorney,
with full power of substitution, in the name of such Lien Grantor, any Secured
Party or otherwise, for the sole use and benefit of the Secured Parties, but at
the Company's expense, to the extent permitted by law to exercise, at any time
and from time to time while an Event of Default shall have occurred and be
continuing, all or any of the following powers with respect to all or any of
such Lien Grantor's Collateral:

                  (a)  to demand, sue for, collect, receive and give acquittance
          for any and all monies due or to become due upon or by virtue thereof,

                  (b)  to settle, compromise, compound, prosecute or defend any
          action or proceeding with respect thereto,

                  (c)  to sell, lease, license or otherwise dispose of the same
          or the proceeds or avails thereof, as fully and effectually as if the
          Collateral Representative were the absolute owner thereof, and

                  (d)  to extend the time of payment of any or all thereof and
         to make any allowance or other adjustment with reference thereto;

provided that, except in the case of Collateral that is perishable or threatens
to decline speedily in value or is of a type customarily sold on a recognized
market, the Collateral Representative will give the relevant Lien Grantor at
least ten days' prior written notice of the time and place of any public sale
thereof or the time after which any private sale or other intended disposition
thereof will be made. Any such notice shall (i) contain the information
specified in UCC Section 9-613,

                                       19
<PAGE>

(ii) be Authenticated and (iii) be sent to the parties required to be notified
pursuant to UCC Section 9-611(c); provided that, if the Collateral
Representative fails to comply with this sentence in any respect, its liability
for such failure shall be limited to the liability (if any) imposed on it as a
matter of law under the UCC.

         Section 12.  Limitation on Duty in Respect of Collateral. Beyond the
exercise of reasonable care in the custody and preservation thereof, the
Collateral Representative will have no duty as to any Collateral in its
possession or control or in the possession or control of any sub-agent or bailee
or any income therefrom or as to the preservation of rights against prior
parties or any other rights pertaining thereto. The Collateral Representative
will be deemed to have exercised reasonable care in the custody and preservation
of the Collateral in its possession or control if such Collateral is accorded
treatment substantially equal to that which it accords its own property, and
will not be liable or responsible for any loss or damage to any Collateral, or
for any diminution in the value thereof, by reason of any act or omission of any
sub-agent or bailee selected by the Collateral Representative in good faith,
except to the extent that such liability arises from the Collateral
Representative's gross negligence or willful misconduct.

         Section 13.  General Provisions Concerning the Collateral
Representative. (a Authority. The Collateral Representative is authorized to
take such actions and to exercise such powers as are delegated to the Collateral
Representative by the terms of the Security Documents, together with such
actions and powers as are reasonably incidental thereto.

          (b)  Rights and Powers as a Secured Party. The Collateral
Representative shall, in its capacity as a Secured Party, have the same rights
and powers as any other Secured Party and may exercise the same as though it
were not the Collateral Representative.

          (c)  Limited Duties and Responsibilities. The Collateral
Representative shall not have any duties or obligations under the Security
Documents except those expressly set forth therein. Without limiting the
generality of the foregoing, (a) the Collateral Representative shall not be
subject to any fiduciary or other implied duties, regardless of whether an Event
of Default has occurred and is continuing and (b) the Collateral Representative
shall not have any duty to take any discretionary action or exercise any
discretionary powers, except discretionary rights and powers expressly
contemplated by the Security Documents that the Collateral Representative is
required in writing to exercise by the Required Holders. The Collateral
Representative shall not be liable for any action taken or not taken by it with
the consent or at the request of the Required Holders or in the absence of its
own gross negligence or willful misconduct. The Collateral

                                       20
<PAGE>

Representative shall not be responsible for the existence, genuineness or value
of any Collateral or for the validity, perfection, priority or enforceability of
any Transaction Lien, whether impaired by operation of law or by reason of any
action or omission to act on its part under the Security Documents. The
Collateral Representative shall be deemed not to have knowledge of any Event of
Default unless and until written notice thereof is given to the Collateral
Representative by the Company or a Secured Party, and the Collateral
Representative shall not be responsible for or have any duty to ascertain or
inquire into (i) any statement, warranty or representation made in or in
connection with any Security Document, (ii) the contents of any certificate,
report or other document delivered thereunder or in connection therewith, (iii)
the performance or observance of any of the covenants, agreements or other terms
or conditions set forth in any Security Document, (iv) the validity,
enforceability, effectiveness or genuineness of any Security Document or any
other agreement, instrument or document, or (v) the satisfaction of any
condition set forth in any Security Document.

          (d)  Authority to Rely on Certain Writings, Statements and Advice. The
Collateral Representative shall be entitled to rely on, and shall not incur any
liability for relying on, any notice, request, certificate, consent, statement,
instrument, document or other writing believed by it to be genuine and to have
been signed or sent by the proper Person. The Collateral Representative also may
rely on any statement made to it orally or by telephone and believed by it to be
made by the proper Person, and shall not incur any liability for relying
thereon. The Collateral Representative may consult with legal counsel (who may
be counsel for the Company), independent accountants and other experts selected
by it, and shall not be liable for any action taken or not taken by it in
accordance with the advice of any such counsel, accountant or expert.

          (e)  Sub-Agents and Related Parties. The Collateral Representative may
perform any of its duties and exercise any of its rights and powers through one
or more sub-agents appointed by it. The Collateral Representative and any such
sub-agent may perform any of its duties and exercise any of its rights and
powers through its Related Parties. The exculpatory provisions of Section 12 and
this Section shall apply to any such sub-agent and to the Related Parties of the
Collateral Representative and any such sub-agent.

          (f)  The Collateral Representative may refuse to act on any notice,
consent, direction or instruction from any Secured Parties or any agent, trustee
or similar representative thereof that, in the Collateral Representative's
opinion, (i) is contrary to law or the provisions of any Security Document or
(ii) may expose the Collateral Representative to liability (unless the
Collateral Representative shall have been indemnified, to its reasonable
satisfaction, for such liability by the Secured Parties that gave such notice,
consent, direction or instruction).

                                       21
<PAGE>

          (g)  Resignation; Successor Collateral Representative. Subject to the
appointment and acceptance of a successor Collateral Representative as provided
in this subsection, the Collateral Representative may resign at any time by
notifying the Holders and the Company. Upon any such resignation, the Required
Holders shall have the right, in consultation with the Company, to appoint a
successor Collateral Representative. If no successor shall have been so
appointed by the Required Holders and shall have accepted such appointment
within 30 days after the retiring Collateral Representative gives notice of its
resignation, then the retiring Collateral Representative may, on behalf of the
Secured Parties, appoint a successor Collateral Representative. Upon acceptance
of its appointment as Collateral Representative hereunder by a successor, such
successor shall succeed to and become vested with all the rights, powers,
privileges and duties of the retiring Collateral Representative hereunder, and
the retiring Collateral Representative shall be discharged from its duties and
obligations hereunder. After the Collateral Representative's resignation
hereunder, the provisions of this Section and Section 12 shall continue in
effect for the benefit of such retiring Collateral Representative, its
sub-agents and their respective Related Parties in respect of any actions taken
or omitted to be taken by any of them while the retiring Collateral
Representative was acting as Collateral Representative.

          Section 14.  Termination of Transaction Liens; Release of Collateral.
(a The Transaction Liens granted by each Guarantor shall terminate when its
Secured Guarantee is released pursuant to Section 2(c).

          (b)  The Transaction Liens granted by the Company shall terminate when
all the Release Conditions are satisfied.

          (c)  At any time before the Transaction Liens granted by the Company
terminate, the Collateral Representative may, at the written request of the
Company, release any or all of the Collateral with the prior written consent of
the Required Holders.

          (d)  Upon any termination of a Transaction Lien or release of
Collateral, the Collateral Representative will, at the expense of the relevant
Lien Grantor, execute and deliver to such Lien Grantor such documents as such
Lien Grantor shall reasonably request to evidence the termination of such
Transaction Lien or the release of such Collateral, as the case may be.

          Section 15.  Additional Guarantors and Lien Grantors. Any Subsidiary
may become a party hereto by signing and delivering to the Collateral
Representative a Security Agreement Supplement, whereupon such Subsidiary shall
become a "Guarantor" and a "Lien Grantor" as defined herein.

                                       22
<PAGE>

           Section 16. Notices. Each notice, request or other communication
given to any party hereunder shall be in writing (which term includes facsimile
or other electronic transmission) and shall be effective (i) when delivered to
such party at its address specified below, (ii) when sent to such party by
facsimile, addressed to it at its facsimile number specified below, and such
party sends back an electronic confirmation of receipt or (iii) ten days after
being sent to such party by certified or registered United States mail,
addressed to it at its address specified below, with first class or airmail
postage prepaid:

                  (a)  in the case of any Lien Grantor listed on the signature
           pages hereof:

                        NaviSite, Inc.
                        400 Minuteman Road
                        Andover, MA 01810
                        Attention: General Counsel
                        Facsimile: (978) 682-8100

                        ClickHear, Inc.
                        400 Minuteman Road
                        Andover, MA 01810
                        Attention: General Counsel
                        Fax: (978) 682-8100

                  (b)  in the case of any other Lien Grantor, its address or
           facsimile number set forth in its first Security Agreement
           Supplement;

                  (c)  in the case of the Collateral Representative:

                        Compaq Financial Services Corporation
                        420 Mountain Avenue
                        Murray Hill, NJ 07974
                        Attention: General Counsel
                        Facsimile: (908) 898-4137

                  (d)  in the case of any Holder, to such Holder at its address
           or facsimile number specified in or pursuant to Section 10.04 of the
           Note Purchase Agreement.

Any party may change its address and/or facsimile number for purposes of this
Section by giving notice of such change to the Collateral Representative and the
Lien Grantors in the manner specified above.

                                       23
<PAGE>

         Section 17. No Implied Waivers; Remedies Not Exclusive. No failure by
the Collateral Representative or any Secured Party to exercise, and no delay in
exercising and no course of dealing with respect to, any right or remedy under
any Security Document shall operate as a waiver thereof; nor shall any single or
partial exercise by the Collateral Representative or any Secured Party of any
right or remedy under any Note Document preclude any other or further exercise
thereof or the exercise of any other right or remedy. The rights and remedies
specified in the Note Documents are cumulative and are not exclusive of any
other rights or remedies provided by law.

         Section 18. Successors and Assigns. This Agreement is for the benefit
of the Collateral Representative and the Secured Parties. If all or any part of
any Secured Party's interest in any Secured Obligation is assigned or otherwise
transferred, the transferor's rights hereunder, to the extent applicable to the
obligation so transferred, shall be automatically transferred with such
obligation. This Agreement shall be binding on the Lien Grantors and their
respective successors and assigns.

         Section 19. Amendments and Waivers. Neither this Agreement nor any
provision hereof may be waived, amended, modified or terminated except pursuant
to an agreement or agreements in writing enter into by the parties hereto, with
the consent of Required Holders.

         Section 20. Choice of Law. This Agreement shall be construed in
accordance with and governed by the laws of the State of New York, except as
otherwise required by mandatory provisions of law and except to the extent that
remedies provided by the laws of any jurisdiction other than the State of New
York are governed by the laws of such jurisdiction.

         Section 21. Waiver of Jury Trial. EACH PARTY HERETO WAIVES, TO THE
FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT IT MAY HAVE TO A TRIAL BY
JURY IN ANY LEGAL PROCEEDING DIRECTLY OR INDIRECTLY ARISING OUT OF OR RELATING
TO ANY SECURITY DOCUMENT OR ANY TRANSACTION CONTEMPLATED THEREBY (WHETHER BASED
ON CONTRACT, TORT OR ANY OTHER THEORY). EACH PARTY HERETO (A) CERTIFIES THAT NO
REPRESENTATIVE, AGENT OR ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY
OR OTHERWISE, THAT SUCH OTHER PARTY WOULD NOT, IN THE EVENT OF LITIGATION, SEEK
TO ENFORCE THE FOREGOING WAIVER AND (B) ACKNOWLEDGES THAT IT AND THE OTHER
PARTIES HERETO HAVE BEEN INDUCED TO ENTER INTO THIS AGREEMENT BY, AMONG OTHER
THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS IN THIS SECTION.

                                       24
<PAGE>

         Section 22. Severability. If any provision of any Security Document is
invalid or unenforceable in any jurisdiction, then, to the fullest extent
permitted by law, (i) the other provisions of the Security Documents shall
remain in full force and effect in such jurisdiction and shall be liberally
construed in favor of the Collateral Representative and the Secured Parties in
order to carry out the intentions of the parties thereto as nearly as may be
possible and (ii) the invalidity or unenforceability of such provision in such
jurisdiction shall not affect the validity or enforceability thereof in any
other jurisdiction.

                                       25
<PAGE>

         IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be
duly executed by their respective authorized officers as of the day and year
first above written.

                                  NAVISITE, INC.

                                  By: /s/ Patricia Gilligan
                                      -----------------------------
                                      Name:  Patricia Gilligan
                                      Title: Chief Executive Officer

                                  COMPAQ FINANCIAL SERVICES CORPORATION, as
                                  Collateral Representative

                                  By: /s/ Edward W. Andrews, Jr.
                                      -----------------------------
                                      Name:  Edward W. Andrews. Jr.
                                      Title: Vice President & Managing Director

                                  Guarantors:

                                  CLICKHEAR, INC.

                                  By: /s/ Patricia Gilligan
                                      -----------------------------
                                      Name:
                                      Title:

                                       26
<PAGE>

                                                                      SCHEDULE 1

                EQUITY INTERESTS IN SUBSIDIARIES AND AFFILIATES
                        OWNED BY ORIGINAL LIEN GRANTORS
                          (as of the Effective Date)

<TABLE>
<CAPTION>
                              Jurisdiction                                                Number of
                                   of                 Owner of            Percentage      Shares or
           Issuer             Organization        Equity Interest           Owned           Units
-------------------------     ------------    ----------------------      ----------     ----------
<S>                           <C>             <C>                         <C>            <C>
      ClickHear, Inc.           Delaware           NaviSite, Inc.            100%        100 shares
</TABLE>

                                     S-1-1
<PAGE>

                                                                       EXHIBIT A
                                                           to Security Agreement

                         SECURITY AGREEMENT SUPPLEMENT

         SECURITY AGREEMENT SUPPLEMENT dated as of _______, ____, between [NAME
OF LIEN GRANTOR] (the "Lien Grantor") and COMPAQ FINANCIAL SERVICES CORPORATION,
as Collateral Representative.

         WHEREAS, NAVISITE, INC., the Guarantors party thereto and COMPAQ
FINANCIAL SERVICES CORPORATION, as Collateral Representative, are parties to a
Guarantee and Security Agreement dated as of November, 2001 (as heretofore
amended and/or supplemented, the "Security Agreement") under which NAVISITE,
INC. secures certain of its obligations (the "Secured Obligations") and the
Guarantors guarantee the Secured Obligations and secure their respective
guarantees thereof;

         WHEREAS, [name of Lien Grantor] desires to become [is] a party to the
Security Agreement as a Guarantor and Lien Grantor thereunder;/1/ and

         WHEREAS, terms defined in the Security Agreement (or whose definitions
are incorporated by reference in Section 1 of the Security Agreement) and not
otherwise defined herein have, as used herein, the respective meanings provided
for therein;

         NOW, THEREFORE, in consideration of the foregoing and other good and
valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties hereto agree as follows:

         1. Secured Guarantee./2/ The Lien Grantor unconditionally guarantees
the full and punctual payment of each Secured Obligation when due (whether at
stated maturity, upon acceleration or otherwise). The Lien Grantor acknowledges
that, by signing this Security Agreement Supplement and delivering it to the
Collateral Representative, the Lien Grantor becomes a "Guarantor" and "Lien
Grantor" for all purposes of the Security Agreement and that its obligations
under the foregoing Secured Guarantee are subject to all the provisions of the
Security

_____________________

         /1/ If the Lien Grantor is the Company, delete this recital and Section
1 hereof.

         /2/ Delete this Section if the Lien Grantor is the Company or a
Guarantor that is already a party to the Security Agreement.

                                      A-1
<PAGE>

Agreement (including those set forth in Section 2 thereof) applicable to the
obligations of a Guarantor thereunder.

           2.  Grant of Transaction Liens. (a) In order to secure [its Secured
Guarantee]/3/ [the Secured Obligations]/4/, the Lien Grantor grants to the
Collateral Representative for the benefit of the Secured Parties a continuing
security interest in all the following property of the Lien Grantor, whether now
owned or existing or hereafter acquired or arising and regardless of where
located (the "New Collateral"):

           [describe property being added to the Collateral]/5/

           (b) With respect to each right to payment or performance included in
the Collateral from time to time, the Transaction Lien granted therein includes
a continuing security interest in (i) any Supporting Obligation that supports
such payment or performance and (ii) any Lien that (x) secures such right to
payment or performance or (y) secures any such Supporting Obligation.

           (c) The foregoing Transaction Liens are granted as security only and
shall not subject the Collateral Representative or any other Secured Party to,
or transfer or in any way affect or modify, any obligation or liability of the
Lien Grantor with respect to any of the New Collateral or any transaction in
connection therewith.

           3.  Party to Security Agreement. Upon delivering this Security
Agreement Supplement to the Collateral Representative, the Lien Grantor will
become a party to the Security Agreement and will thereafter have all the rights
and obligations of a Guarantor and a Lien Grantor thereunder and be bound by all
the provisions thereof as fully as if the Lien Grantor were one of the original
parties thereto./6/

           4.  Address of Lien Grantor. The address and facsimile number of the
Lien Grantor for purposes of Section 16(b) of the Security Agreement are:

           [address and facsimile number of Lien Grantor]

___________________

       /3/  Delete bracketed words if the Lien Grantor is the Company.

       /4/  Delete bracketed words if the Lien Grantor is a Guarantor.

       /5/  If the Lien Grantor is not already a party to the Security
Agreement, clauses (i) through (_) of, and the proviso to, Section 3(a) of the
Security Agreement may be appropriate.

       /6/  Delete Sections 4 and 5 if the Lien Grantor is already a party to
the Security Agreement.

                                      A-2
<PAGE>

          5.  Representations and Warranties./7/ (a) The Lien Grantor is a
corporation duly organized, validly existing and in good standing under the laws
of [jurisdiction of organization].

          (b) The Lien Grantor has delivered a Perfection Certificate to the
Collateral Representative. The information set forth therein is correct and
complete as of the date hereof. Within 60 days after the date hereof, the Lien
Grantor will furnish to the Collateral Representative a file search report from
each UCC filing office listed in such Perfection Certificate, showing the filing
made at such filing office to perfect the Transaction Liens on the New
Collateral.

          (c) The execution and delivery of this Security Agreement Supplement
by the Lien Grantor and the performance by it of its obligations under the
Security Agreement as supplemented hereby are within its corporate or other
powers, have been duly authorized by all necessary corporate or other action,
require no action by or in respect of, or filing with, any governmental body,
agency or official and do not contravene, or constitute a default under, any
provision of applicable law or regulation or of its organizational documents, or
of any agreement, judgment, injunction, order, decree or other instrument
binding upon it or result in the creation or imposition of any Lien (except a
Transaction Lien) on any of its assets.

          (d) The Security Agreement as supplemented hereby constitutes a valid
and binding agreement of the Lien Grantor, enforceable in accordance with its
terms, except as limited by (i) applicable bankruptcy, insolvency, fraudulent
conveyance or other similar laws affecting creditors' rights generally and (ii)
general principles of equity.

          (e) Each of the representations and warranties set forth in the
Security Agreement is true as applied to the Lien Grantor and the New
Collateral. For purposes of the foregoing sentence, references in said Sections
to a "Lien Grantor" shall be deemed to refer to the Lien Grantor, references to
Schedules to the Security Agreement shall be deemed to refer to the
corresponding Schedules to this Security Agreement Supplement, references to
"Collateral" shall be deemed to refer to the New Collateral, and references to
the "Effective Date" shall be deemed to refer to the date on which the Lien
Grantor signs and delivers this Security Agreement Supplement.

          6.  Governing Law. This Security Agreement Supplement shall be
construed in accordance with and governed by the laws of the State of New York.

____________________________________

      /7/ Modify as needed if the Lien Grantor is not a corporation.

                                      A-3
<PAGE>

         IN WITNESS WHEREOF, the parties hereto have caused this Security
Agreement Supplement to be duly executed by their respective authorized officers
as of the day and year first above written.

                                   [_______________________], as Lien Grantor

                                   By:__________________________________________
                                      Name:
                                      Title:

                                   COMPAQ FINANCIAL SERVICES CORPORATION,
                                      as Collateral Representative

                                   By:__________________________________________
                                      Name:
                                      Title:

                                      A-4
<PAGE>

                                                                      Schedule 1
                                                           to Security Agreement
                                                                      Supplement

                EQUITY INTERESTS IN SUBSIDIARIES AND AFFILIATES
                             OWNED BY LIEN GRANTOR

                               Jurisdiction
                                    of            Percentage       Number of
               Issuer          Organization          Owned      Shares or Units
---------------------------  ----------------  ---------------  ----------------

                                      A-5
<PAGE>

                                                                       EXHIBIT B
                                                           to Security Agreement

                            PERFECTION CERTIFICATE

         The undersigned is a duly authorized officer of [NAME OF LIEN GRANTOR]
(the "Lien Grantor"). With reference to the Guarantee and Security Agreement
dated as of November, 2001 among NAVISITE, INC., the Guarantors party thereto
and COMPAQ FINANCIAL SERVICES CORPORATION, as Collateral Representative (terms
defined therein being used herein as therein defined), the undersigned certifies
to the Collateral Representative and each other Secured Party as follows:

         A.    Information Required for Filings and Searches for Prior Filings.

         1.   Jurisdiction of Organization. The Lien Grantor is a
corporation/1/ organized under the laws of_____________.

         2.   Name. The exact [corporate] name of the Lien Grantor as it appears
in its [certificate of incorporation] is as follows:

         3.   Prior Names. (a) Set forth below is each other [corporate] name
that the Lien Grantor has had since its organization, together with the date of
the relevant change:

               (b)  Except as set forth in Schedule __ hereto, the Lien Grantor
         has not changed its corporate structure/2/ in any way within the past
         five years.

               (c)  None of the Lien Grantor's Collateral was acquired from
         another Person within the past five years, except

                      (i)   property sold to the Lien Grantor by another Person
               in the ordinary course of such other Person's business;

___________________________

          /1/ Modify as needed if the Lien Grantor is not a corporation.

          /2/ Changes in corporate structure would include mergers and
consolidations, as well as any change in the Lien Grantor's form of
organization. If any such change has occurred, include in Schedule __ the
information required by Part A of this certificate as to each constituent party
to a merger or consolidation and any other predecessor organization.

                                      B-1
<PAGE>

                       (ii)  property with respect to which the Transaction
               Liens are to be perfected by taking possession or control
               thereof;

                       (iii) property acquired in transactions described in
               Schedule __ hereto; and

                       (iv)  other property having an aggregate fair market
               value not exceeding $__________.

           4. Filing Office. In order to perfect the Transaction Liens granted
by the Lien Grantor, a duly signed financing statement on Form UCC-1, with the
collateral described as set forth on Schedule __ hereto, should be on file in
the office of ____________ in __________/3/ [and a duly signed financing
statement on Form UCC-1 containing, with respect to any as-extracted collateral,
the information required by UCC Section 9-502 should be on file in the relevant
filing office listed under the heading "As-Extracted Collateral" in Schedule ___
hereto]/4/.

B.         Additional Information Required for Searches for Prior Filings Under
           Old Article 9.

           1. Current Locations. (a) The chief executive office of the Lien
Grantor is located at the following address:

Mailing Address                    County                    State
---------------------------------  ------------------------  -----------------

The Lien Grantor [does] [does not] have a place of business in another county of
the State listed above.

              (b)   The following are all places of business of the Lien Grantor
           not identified above:

Mailing Address                    County                    State
---------------------------------  ------------------------  -----------------

__________________________

      /3/ Insert Lien Grantor's "location" determined as provided in UCC Section
9-307.

      /4/ Delete bracketed words unless a Lien Grantor owns or may own
"as-extracted collateral" (as defined in UCC Section 9-102) as a known location.

                                      B-2
<PAGE>

               (c)  The following are all locations not identified above where
         the Lien Grantor maintains any Inventory:

Mailing Address                      County                    State
---------------------------------    -----------------------   -----------------

               (d)  The following are the names and addresses of all Persons
         (other than the Lien Grantor) that have possession of any of the Lien
         Grantor's Inventory:

Mailing Address                      County                    State
---------------------------------    -----------------------   -----------------

         2.  Prior Locations. (a) Set forth below is the information required
by paragraphs (a) and (b) of Part B-1 above with respect to each other location
or place of business maintained by the Lien Grantor at any time during the past
five years:

               (b)  Set forth below is the information required by paragraphs
         (c) and (d) of Part B-1 above with respect to each other location or
         bailee where or with whom any of the Lien Grantor's Inventory has been
         lodged at any time during the past four months:

         C.    Search Reports.

         Attached hereto as Schedule __ is a true copy of a file search report
from the central UCC filing office in each jurisdiction identified in Part A-4
and Part B-3 above with respect to each name set forth in Part A-2 and Part A-3
above (searches in local filing offices, if any, are not required). Attached
hereto as Schedule __ is a true copy of each financing statement or other filing
identified in such file search reports.

                                      B-3
<PAGE>

         D.  UCC Filings.

         Attached hereto as Schedule __ is a schedule setting forth filing
information with respect to the filings referred to in Part A-4 and Part B-3
above. All filing fees and taxes payable in connection with such filings have
been paid. Attached hereto as Schedule __ is a true copy of each such filing
duly acknowledged by the filing officer.

         IN WITNESS WHEREOF, I have hereunto set my hand this __ day of
__________, ____

                                               _________________________________
                                               Name:
                                               Title:

                                      B-4
<PAGE>

                                                                      Schedule 1
                                                       to Perfection Certificate

                           DESCRIPTION OF COLLATERAL

All personal property.

                                      B-5
<PAGE>

                                                                   Schedule 2 to
                                                          Perfection Certificate

                              SCHEDULE OF FILINGS

                          AGAINST _________________,
                                  AS DEBTOR

          Filing Office              File Number         Date of Filing/5/
---------------------------------  ------------------  -------------------------

_______________________

     /5/ Also indicate lapse date, if other than fifth anniversary.

                                      B-6
<PAGE>

                                                                       EXHIBIT C
                                                           to Security Agreement

                           ISSUER CONTROL AGREEMENT

         ISSUER CONTROL AGREEMENT dated as of ______, _____ among _____________
(the "Lien Grantor"), COMPAQ FINANCIAL SERVICES CORPORATION, as Collateral
Representative (the "Secured Party"), and _________ (the "Issuer"). All
references herein to the "UCC" refer to the Uniform Commercial Code as in effect
from time to time in [Issuer's jurisdiction of incorporation].

                             W I T N E S S E T H :

         WHEREAS, the Lien Grantor is the registered holder of [specify Pledged
Uncertificated Securities issued by the Issuer] issued by the Issuer (the
"Securities");

         WHEREAS, pursuant to a Guarantee and Security Agreement dated as of
November, 2001 (as such agreement may be amended and/or supplemented from time
to time, the "Security Agreement"), the Lien Grantor has granted to the Secured
Party a continuing security interest (the "Transaction Lien") in all right,
title and interest of the Lien Grantor in, to and under the Securities, whether
now existing or hereafter arising; and

         WHEREAS, the parties hereto are entering into this Agreement in order
to perfect the Transaction Lien on the Securities;

         NOW, THEREFORE, the parties hereto agree as follows:

         Section 1. Nature of Securities. The Issuer confirms that (i) the
Securities are "uncertificated securities" (as defined in Section 8-102 of the
UCC) and (ii) the Lien Grantor is registered on the books of the Issuer as the
registered holder of the Securities.

         Section 2. Instructions. The Issuer agrees to comply with any
"instruction" (as defined in Section 8-102 of the UCC) originated by the Secured
Party and relating to the Securities without further consent by the Lien Grantor
or

                                      C-1
<PAGE>

any other person. The Lien Grantor consents to the foregoing agreement by the
Issuer.

         Section 3. Waiver of Lien; Waiver of Set-off. The Issuer waives any
security interest, lien or right of setoff that it may now have or hereafter
acquire in or with respect to the Securities. The Issuer's obligations in
respect of the Securities will not be subject to deduction, set-off or any other
right in favor of any person other than the Secured Party.

         Section 4. Choice of Law. This Agreement shall be governed by the laws
of [Issuer's jurisdiction of incorporation]./1/

         Section 5. Conflict with Other Agreements. There is no agreement
(except this Agreement) between the Issuer and the Lien Grantor with respect to
the Securities [except for [identify any existing other agreements] (the
"Existing Other Agreements")]. In the event of any conflict between this
Agreement (or any portion hereof) and any other agreement [(including any
Existing Other Agreement)] between the Issuer and the Lien Grantor with respect
to the Securities, whether now existing or hereafter entered into, the terms of
this Agreement shall prevail.

         Section 6. Amendments. No amendment or modification of this Agreement
or waiver of any right hereunder shall be binding on any party hereto unless it
is in writing and is signed by all the parties hereto.

         Section 7. Notice of Adverse Claims. Except for the claims and
interests of the Secured Party and the Lien Grantor in the Securities, the
Issuer does not know of any claim to, or interest in, the Securities. If any
person asserts any lien, encumbrance or adverse claim (including any writ,
garnishment, judgment, attachment, execution or similar process) against the
Securities, the Issuer will promptly notify the Secured Party and the Lien
Grantor thereof.

         Section 8. Maintenance of Securities. In addition to, and not in lieu
of, the obligation of the Issuer to honor instructions as agreed in Section 2
hereof, the Issuer agrees as follows:

              (i)   Lien Grantor Instructions; Notice of Exclusive Control. So
         long as the Issuer has not received a Notice of Exclusive Control (as

_______________________

         /1/ If the Issuer's jurisdiction of incorporation is not a State in the
United States that has adopted the revisions to Articles * and 9 of the UCC
promulgated in 1994, this form of Issuer Control Agreement will not be
appropriate. It may be necessary to transfer the relevant securities into the
Collateral Representative's name to obtain comparable results under the laws of
such jurisdiction.

                                      C-2
<PAGE>

         defined below), the Issuer may comply with instructions of the Lien
         Grantor or any duly authorized agent of the Lien Grantor in respect of
         the Securities. After the Issuer receives a written notice from the
         Secured Party that it is exercising exclusive control over the
         Securities (a "Notice of Exclusive Control"), the Issuer will cease
         complying with instructions of the Lien Grantor or any of its agents.

                 (ii)  Non-Cash Dividends and Distributions. The Issuer shall
         deliver to the Secured Party all dividends, interest and other
         distributions paid or made upon or with respect to the Securities.

                (iii)  Voting Rights. Until the Issuer receives a Notice of
         Exclusive Control, the Lien Grantor shall be entitled to direct the
         Issuer with respect to voting the Securities.

                 (iv)  Statements and Confirmations. The Issuer will promptly
         send copies of all statements and other correspondence concerning the
         Securities simultaneously to each of the Lien Grantor and the Secured
         Party at their respective addresses specified in Section 11 hereof.

                  (v)  Tax Reporting. All items of income, gain, expense and
         loss recognized in respect of the Securities shall be reported to the
         Internal Revenue Service and all state and local taxing authorities
         under the name and taxpayer identification number of the Lien Grantor.

         Section 9.    Representations, Warranties and Covenants of the Issuer.
The Issuer makes the following representations, warranties and covenants:

                  (i)  This Agreement is a valid and binding agreement of the
         Issuer enforceable in accordance with its terms.

                  (ii) The Issuer has not entered into, and until the
         termination of this Agreement will not enter into, any agreement with
         any other person relating to the Securities pursuant to which it has
         agreed, or will agree, to comply with instructions (as defined in
         Section 8-102 of the UCC) of such person. The Issuer has not entered
         into any other agreement with the Lien Grantor or the Secured Party
         purporting to limit or condition the obligation of the Issuer to comply
         with instructions as agreed in Section 2 hereof.

         Section 10.   Successors. This Agreement shall be binding upon, and
shall inure to the benefit of, the parties hereto and their respective
successors and assigns.

                                      C-3
<PAGE>

         Section 11. Notices. Each notice, request or other communication given
to any party hereunder shall be in writing (which term includes facsimile or
other electronic transmission) and shall be effective (i) when delivered to such
party at its address specified below, (ii) when sent to such party by facsimile
or other electronic transmission, addressed to it at its facsimile number or
electronic address specified below, and such party sends back an electronic
confirmation of receipt or (iii) ten days after being sent to such party by
certified or registered United States mail, addressed to it at its address
specified below, with first class or airmail postage prepaid:

         Lien Grantor:

         Secured Party:

         Issuer:

Any party may change its address and/or facsimile number for purposes of this
Section by giving notice of such change to the other parties in the manner
specified above.

         Section 12. Termination. The rights and powers granted herein to the
Secured Party (i) have been granted in order to perfect the Transaction Lien,
(ii) are powers coupled with an interest and (iii) will not be affected by any
bankruptcy of the Lien Grantor or any lapse of time. The obligations of the
Issuer hereunder shall continue in effect until the Secured Party has notified
the Issuer in writing that the Transaction Lien has been terminated pursuant to
the Security Agreement.

         Section 13. Counterparts. This Agreement may be executed in any number
of counterparts, all of which shall constitute one and the same instrument, and
any party hereto may execute this Agreement by signing and delivering one or
more counterparts.

                                        [NAME OF LIEN GRANTOR]

                                        By:_____________________________________
                                           Name:
                                           Title:

                                      C-4
<PAGE>

                                        COMPAQ FINANCIAL SERVICES
                                           CORPORATION, as Collateral
                                           Representative

                                        By:_____________________________________
                                           Name:
                                           Title:

                                        [NAME OF ISSUER]

                                        By:_____________________________________
                                           Name:
                                           Title:

                                      C-5
<PAGE>

                                                                       Exhibit A

                         [Letterhead of Secured Party]

                                    [Date]

[Name and Address of Issuer]

Attention: ________________________

             Re:  Notice of Exclusive Control
                  ---------------------------

Ladies and Gentlemen:

         As referenced in the Issuer Control Agreement dated as of ______, ____
among [name of Lien Grantor], us and you (a copy of which is attached), we
notify you that we will hereafter exercise exclusive control over [specify
Pledged Uncertificated Securities] registered in the name of [name of Lien
Grantor] (the "Securities"). You are instructed not to accept any directions or
instructions with respect to the Securities from any person other than the
undersigned unless otherwise ordered by a court of competent jurisdiction.

         You are instructed to deliver a copy of this notice by facsimile
transmission to [name of Lien Grantor].

                                    Very truly yours,

                                          COMPAQ FINANCIAL SERVICES
                                             CORPORATION, as Collateral
                                             Representative

                                          By:___________________________________
                                             Title:

cc: [name of Lien Grantor]

                                      C-6<PAGE>
                                                                    EXHIBIT 10.7
                                                                    ------------

                                 NAVISITE, INC.

                       AMENDMENT TO AND RESTATEMENT OF THE
                            INVESTOR RIGHTS AGREEMENT

          This Agreement dated as of November 8, 2001 is entered into by and
among NaviSite, Inc., a Delaware corporation (the "Company"), Compaq Financial
Services Corporation, a Delaware corporation ("CFS"), and CMGI, Inc., a Delaware
corporation ("CMGI," together with CFS, the "Purchasers").

                                    Recitals

          WHEREAS, the Company and the Purchasers entered into a Note Purchase
Agreement dated October 29, 2001 (the "Note Purchase Agreement");

          WHEREAS, in order to induce the Purchasers to enter into the Note
Purchase Agreement, the Company has agreed to provide for certain arrangements
with respect to the registration of shares of capital stock of the Company under
the Securities Act of 1933, as amended;

          WHEREAS, the Company and CMGI entered into the Investor Rights
Agreement on October 27, 1999 (the "Investor Rights Agreement"), as amended on
June 8, 2000 and December 12, 2000; and

          WHEREAS, the Company and CMGI desire to amend and restate in its
entirety the Investor Rights Agreement;

          NOW, THEREFORE, in consideration of the mutual promises and covenants
contained in this Agreement, the parties hereto agree as follows:

I.   Certain Definitions.

          As used in this Agreement, the following terms shall have the
following respective meanings:

          "Commission" means the Securities and Exchange Commission, or any
other federal agency at the time administering the Securities Act.

          "Common Stock" means the common stock, $.01 par value per share, of
the Company.

          "Exchange Act" means the Securities Exchange Act of 1934, as amended,
or any successor federal statute, and the rules and regulations of the
Commission issued under such Act, as they each may, from time to time, be in
effect.

          "Initiating Holders" means the Stockholders initiating a request for
registration pursuant to Section 2.1(a).
<PAGE>

          "Initial Public Offering" means the initial underwritten public
offering of shares of Common Stock pursuant to an effective Registration
Statement.

          "Prospectus" means the prospectus included in any Registration
Statement, as amended or supplemented by an amendment or prospectus supplement,
including post-effective amendments, and all material incorporated by reference
or deemed to be incorporated by reference in such Prospectus.

          "Registration Statement" means a registration statement filed by the
Company with the Commission for a public offering and sale of securities of the
Company (other than a registration statement on Form S-8 or Form S-4, or their
successors, or any other form for a similar limited purpose, or any registration
statement covering only securities proposed to be issued in exchange for
securities or assets of another corporation).

          "Registration Expenses" means the expenses described in Section 2.4.

          "Registrable Shares" means (i) the shares of Common Stock held by CMGI
upon the closing of the Initial Public Offering; (ii) the shares of Common Stock
acquired by CMGI in connection with the Common Stock Purchase Agreement between
the Company and CMGI, dated as of June 8, 2000; (iii) the shares of Common Stock
acquired by CMGI upon any conversion of the Notes issued pursuant to the Note
and Warrant Purchase Agreement between the Company and CMGI, dated as of
December 12, 2000, (the "Note and Warrant Purchase Agreement"); (iv) the shares
of Common Stock acquired by CMGI as payment for interest accrued on the Notes
issued pursuant to the Note and Warrant Purchase Agreement; (v) the shares of
Common Stock acquired by CMGI upon exercise or conversion of the Warrants issued
pursuant to the Note and Warrant Purchase Agreement; (vi) the shares of Common
Stock acquired by CFS and CMGI upon any conversion of the Notes issued pursuant
to the Note Purchase Agreement; (vii) the shares of Common Stock acquired by CFS
and CMGI as payment for interest accrued on the Notes issued pursuant to the
Note Purchase Agreement; and (viii) any other shares of Common Stock issued in
respect of such shares of Common Stock referred to in clause (i), (ii), (iii),
(iv), (v), (vi), or (vii) (because of stock splits, stock dividends,
reclassifications, recapitalizations or similar events); provided, however, that
shares of Common Stock which are Registrable Shares shall cease to be
Registrable Shares upon (i) any sale pursuant to a Registration Statement or
Rule 144 under the Securities Act or (ii) any sale in any manner to a person or
entity which, by virtue of Section 3.3 of this Agreement, is not entitled to the
rights provided by this Agreement.

          "Securities Act" means the Securities Act of 1933, as amended, or any
successor federal statute, and the rules and regulations of the Commission
issued under such Act, as they each may, from time to time, be in effect.

          "Selling Stockholder" means any Stockholder owning Registrable Shares
included in a Registration Statement.

                                       2
<PAGE>

          "Stockholders" means the Purchasers and any persons or entities to
whom the rights granted under this Agreement are transferred by the Purchasers,
its successors or assigns, pursuant to Section 3.3 hereof.

II.  Registration Rights.

          2.1  Required Registrations.

          (a) At any time, a Stockholder or Stockholders may request, in
writing, that the Company effect the registration on Form S-1 or Form S-3 (or
successor forms) of Registrable Shares owned by such Stockholder or Stockholders
having an aggregate value of at least $2,500,000 (based on the then current
public market price).

          (b) Upon receipt of any request for registration pursuant to this
Section 2.1, the Company shall promptly give written notice of such proposed
registration to all other Stockholders. Such Stockholders shall have the right,
by giving written notice to the Company within 15 days after the Company
provides its notice, to elect to have included in such registration such of
their Registrable Shares as such Stockholders may request in such notice of
election, subject in the case of an underwritten offering to the approval of the
managing underwriter as provided in Section 2.1(c) below. Thereupon, the Company
shall, as expeditiously as possible, use its best efforts to effect the
registration on an appropriate registration form of all Registrable Shares which
the Company has been requested to so register.

         (c) If the Initiating Holders intend to distribute the Registrable
Shares covered by their request by means of an underwriting, they shall so
advise the Company as a part of their request made pursuant to Section 2.1(a)
and the Company shall include such information in its written notice referred to
in Section 2.1(b). The right of any other Stockholder to include its Registrable
Shares in such registration pursuant to Section 2.1(a) shall be conditioned upon
such other Stockholder's participation in such underwriting on the terms set
forth herein. If the managing underwriter determines that the marketing factors
require a limitation of the number of shares to be underwritten, the number of
Registrable Shares to be included in a Registration Statement filed pursuant to
this Section 2.1 shall be reduced pro rata among the requesting Stockholders
based on the quotient of (i) the total Registrable Shares to be included in the
Registration Statement, divided by (ii) the total number of Registrable Shares
that requested registration.

          (d) The Initiating Holders shall have the right to select the managing
underwriter(s) for any underwritten offering requested pursuant to Section
2.1(a), subject to the approval of the Company, which approval will not be
unreasonably withheld.

          (e) The Company shall not be required to effect more than five
registrations initiated by CMGI pursuant to Section 2.1(a) or more than ten

                                       3
<PAGE>

registrations initiated by CFS pursuant to Section 2.1(a). In addition, the
Company shall not be required to effect any registration within 90 days after
the effective date of any other Registration Statement of the Company relating
to an underwritten offering. For purposes of this Section 2.1(e), a Registration
Statement shall not be counted until such time as such Registration Statement
has been declared effective by the Commission, unless the Initiating Holders
withdraw their request for such registration (other than as a result of
information concerning the business or financial condition of the Company which
is made known to the Stockholders after the date on which such registration was
requested) and elect not to pay the Registration Expenses therefor pursuant to
Section 2.4.

          (f) If at the time of any request to register Registrable Shares by
the Initiating Holders pursuant to this Section 2.1, the Company is engaged or
has plans to engage in a registered public offering or is engaged in any other
activity which, in the good faith determination of the Company's board of
directors, would be adversely affected by the requested registration or if
financial statements required for the requested registration are not then
available, then the Company may at its option direct that such request be
delayed for a period not in excess of 90 days from the date of such request,
such right to delay a request to be exercised by the Company not more than once
in any 12-month period.

          2.2  Incidental Registration.

          (a) Whenever the Company proposes to file a Registration Statement
(other than a Registration Statement filed pursuant to Section 2.1) at any time
and from time to time, it will, prior to such filing, give written notice to all
Stockholders of its intention to do so; provided, that no such notice need be
given if no Registrable Shares are to be included therein as a result of a
determination of the managing underwriter pursuant to Section 2.2(b). Upon the
written request of a Stockholder or Stockholders given within 20 days after the
Company provides such notice (which request shall state the intended method of
disposition of such Registrable Shares), the Company shall use its best efforts
to cause all Registrable Shares which the Company has been requested by such
Stockholder or Stockholders to register to be registered under the Securities
Act to the extent necessary to permit their sale or other disposition in
accordance with the intended methods of distribution specified in the request of
such Stockholder or Stockholders; provided, that the Company shall have the
right to postpone or withdraw any registration effected pursuant to this Section
2.2 without obligation to any Stockholder.

          (b) If the registration for which the Company gives notice pursuant to
Section 2.2(a) involves an underwriting, the Company shall so advise the
Stockholders as a part of the written notice given pursuant to Section 2.2(a).
In such event, the right of any Stockholder to include its Registrable Shares in
such registration pursuant to Section 2.2 shall be conditioned upon such
Stockholder's participation in such underwriting on the terms set forth herein.
All Stockholders

                                       4
<PAGE>

proposing to distribute their securities through such underwriting shall enter
into an underwriting agreement in customary form with the underwriter or
underwriters selected for the underwriting by the Company. Notwithstanding any
other provision of this Agreement, if the Company and the managing
underwriter(s) determine in good faith that marketing factors require a
limitation of the number of shares to be underwritten, then the Company and the
managing underwriter(s) may exclude shares from the registration and the
underwriting, and the number of shares that may be included in the registration
and the underwriting shall be allocated, first to the Company or the Company
stockholder(s) for which the registration was initiated, and second to each of
the Stockholders requesting inclusion of their Registrable Shares in such
registration and each of the other holders of piggyback registration rights on a
parity with those Stockholders on a pro rata basis based on the total number of
Registrable Shares and other securities requested for inclusion in such
registration by each such Stockholder or other holder. If any holder of
Registrable Shares or any other Company stockholder requesting inclusions of
securities in the registration disapproves of the terms of any such
underwriting, such person may elect to withdraw therefrom by written notice to
the Company, and any Registrable Shares or other securities excluded or
withdrawn from such underwriting shall be withdrawn from such registration.

          (c) Notwithstanding the foregoing, the Company shall not be required,
pursuant to this Section 2.2, to include any Registrable Shares in a
Registration Statement if such Registrable Shares can then be sold pursuant to
Rule 144(k) under the Securities Act and represent less than 1% of the then
outstanding shares of Common Stock.

          2.3  Registration Procedures.

          (a) If and whenever the Company is required by the provisions of this
Agreement to use its best efforts to effect the registration of any Registrable
Shares under the Securities Act, the Company shall:

                    (i)    file with the Commission a Registration Statement
          with respect to such Registrable Shares and use its best efforts to
          cause that Registration Statement to become effective as soon as
          possible;

                    (ii)   as expeditiously as possible, prepare and file with
          the Commission any amendments and supplements to the Registration
          Statement and the prospectus included in the Registration Statement as
          may be necessary to comply with the provisions of the Securities Act
          (including the anti-fraud provisions thereof) and to keep the
          Registration Statement effective for 12 months from the effective date
          or such lesser period until all such Registrable Shares are sold;

                    (iii)  as expeditiously as possible, furnish to each Selling
          Stockholder such reasonable numbers of copies of the Prospectus,
          including any preliminary Prospectus, in conformity with the
          requirements

                                       5
<PAGE>

          of the Securities Act, and such other documents as such Selling
          Stockholder may reasonably request in order to facilitate the public
          sale or other disposition of the Registrable Shares owned by such
          Selling Stockholder;

                    (iv)   as expeditiously as possible, use its best efforts to
          register or qualify the Registrable Shares covered by the Registration
          Statement under the securities or Blue Sky laws of such states as the
          Selling Stockholders shall reasonably request and do any and all other
          acts and things that may be necessary or desirable to enable the
          Selling Stockholders to consummate the public sale or other
          disposition in such states of the Registrable Shares owned by the
          Selling Stockholder; provided, however, that the Company shall not be
          required in connection with this paragraph (iv) to qualify as a
          foreign corporation or execute a general consent to service of process
          in any jurisdiction;

                    (v)    as expeditiously as possible, cause all such
          Registrable Shares to be listed on each securities exchange or
          automated quotation system on which similar securities issued by the
          Company are then listed; and

                    (vi)   promptly make available for inspection by the Selling
          Stockholders, any managing underwriter participating in any
          disposition pursuant to such Registration Statement and any attorney
          or accountant or other agent retained by any such underwriter or
          selected by the Selling Stockholders, all financial and other records,
          pertinent corporate documents and properties of the Company and cause
          the Company's officers, directors, employees and independent
          accountants to supply all information reasonably requested by any such
          Selling Stockholder, underwriter, attorney, accountant or agent in
          connection with such Registration Statement.

          (b) If the Company has delivered a Prospectus to the Selling
Stockholders, and after having done so, the Prospectus is amended to comply with
the requirements of the Securities Act, the Company shall promptly notify the
Selling Stockholders and, if requested, the Selling Stockholders shall
immediately cease making offers of Registrable Shares and return all
Prospectuses to the Company. The Company shall promptly provide the Selling
Stockholders with revised Prospectuses, and following receipt of the revised
Prospectuses, the Selling Stock holders shall be free to resume making offers of
the Registrable Shares.

          (c) In the event that, in the judgment of the Company, it is advisable
to suspend use of a Prospectus included in a Registration Statement due to
pending material developments or other events that have not yet been publicly
disclosed and as to which the Company believes public disclosure would be
detrimental to the Company, the Company shall notify all Selling Stockholders to
such effect, and upon receipt of such notice, each such Selling Stockholder
shall immediately

                                       6
<PAGE>

discontinue any sales of Registrable Shares pursuant to such Registration
Statement until such Selling Stockholder has received copies of a supplemented
or amended Prospectus or until such Selling Stockholder is advised in writing by
the Company that the then current Prospectus may be used and has received copies
of any additional or supplemental filings that are incorporated or deemed
incorporated by reference in such Prospectus. Notwithstanding anything to the
contrary herein, the Company shall not exercise its rights under this Section
2.3(c) to suspend sales of Registrable Shares for a period in excess of 90 days
in any 365-day period.

          2.4  Allocation of Expenses.  The Company will pay all Registration
Expenses for all registrations under this Agreement; provided, however, that if
a registration under Section 2.1 is withdrawn at the request of the Initiating
Holders (other than as a result of information concerning the business or
financial condition of the Company which is made known to the Stockholders after
the date on which such registration was requested) and if the Initiating Holders
elect not to have such registration counted as a registration requested under
Section 2.1, the requesting Stockholders shall pay the Registration Expenses of
such registration pro rata in accordance with the number of their Registrable
Shares included in such registration. For purposes of this Section, the term
"Registration Expenses" shall mean all expenses incurred by the Company in
complying with this Agreement, including, without limitation, all registration
and filing fees, exchange listing fees, printing expenses, fees and expenses of
counsel for the Company and the fees and expenses of one counsel selected by the
Selling Stockholders to represent the Selling Stockholders, state Blue Sky fees
and expenses and the expense of any special audits incident to or required by
any such registration, but excluding underwriting discounts, selling commissions
and the fees and expenses of Selling Stockholders' own counsel (other than the
counsel selected to represent all Selling Stockholders).

          2.5  Indemnification and Contribution.

          (a) In the event of any registration of any of the Registrable Shares
under the Securities Act pursuant to this Agreement, the Company will indemnify
and hold harmless the Selling Stockholder, each underwriter of such Registrable
Shares and each other person, if any, who controls such Selling Stockholder or
underwriter within the meaning of the Securities Act or the Exchange Act against
any losses, claims, damages or liabilities, joint or several, to which such
Selling Stockholder, underwriter or controlling person may become subject under
the Securities Act, the Exchange Act, state securities or Blue Sky laws or
otherwise, insofar as such losses, claims, damages or liabilities (or actions in
respect thereof) (i) arise out of or are based upon any untrue statement or
alleged untrue statement of any material fact contained in any Registration
Statement under which such Registrable Shares were registered under the
Securities Act, any preliminary prospectus or final prospectus contained in the
Registration Statement or any amendment or supplement to such Registration
Statement or (ii) arise out of or are based upon the omission or alleged
omission to state a material fact required to be

                                       7
<PAGE>

stated therein or necessary to make the statements therein not misleading; and
the Company will reimburse such Selling Stockholder, underwriter and controlling
person for any legal or any other expenses reasonably incurred by such Selling
Stockholder, underwriter or controlling person in connection with investigating
or defending any such loss, claim, damage, liability or action; provided,
however, that the Company will not be liable in any such case to the extent that
any such loss, claim, damage or liability arises out of or is based upon any
untrue statement or omission made in such Registration Statement, preliminary
prospectus or prospectus, or any such amendment or supplement, in reliance upon
and in conformity with information furnished to the Company, in writing, by or
on behalf of such Selling Stockholder, underwriter or controlling person
specifically for use in the preparation thereof.

          (b) In the event of any registration of any of the Registrable Shares
under the Securities Act pursuant to this Agreement, each Selling Stockholder,
severally and not jointly, will indemnify and hold harmless the Company, each of
its directors and officers and each underwriter (if any) and each person, if
any, who controls the Company or any such underwriter within the meaning of the
Securities Act or the Exchange Act, against any losses, claims, damages or
liabilities, joint or several, to which the Company, such directors and
officers, underwriter or controlling person may become subject under the
Securities Act, Exchange Act, state securities or Blue Sky laws or otherwise,
insofar as such losses, claims, damages or liabilities (or actions in respect
thereof) (i) arise out of or are based upon any untrue statement or alleged
untrue statement of a material fact contained in any Registration Statement
under which such Registrable Shares were registered under the Securities Act,
any preliminary prospectus or final prospectus contained in the Registration
Statement or any amendment or supplement to the Registration Statement or (ii)
arise out of or are based upon any omission or alleged omission to state a
material fact required to be stated therein or necessary to make the statements
therein not misleading, if the statement or omission was made in reliance upon
and in conformity with information relating to such Selling Stockholder
furnished in writing to the Company by or on behalf of such Selling Stockholder
specifically for use in connection with the preparation of such Registration
Statement, prospectus, amendment or supplement; provided, however, that the
obligations of a Selling Stockholder hereunder shall be limited to an amount
equal to the net proceeds to such Selling Stockholder of Registrable Shares sold
in connection with such registration.

          (c) Each party entitled to indemnification under this Section 2.5 (the
"Indemnified Party") shall give notice to the party required to provide
indemnification (the "Indemnifying Party") promptly after such Indemnified Party
has actual knowledge of any claim as to which indemnity may be sought and shall
permit the Indemnifying Party to assume the defense of any such claim or any
litigation resulting therefrom; provided, that counsel for the Indemnifying
Party, who shall conduct the defense of such claim or litigation, shall be
approved by the Indemnified Party (whose approval shall not be unreasonably
withheld);

                                       8
<PAGE>

and, provided, further, that the failure of any Indemnified Party to give notice
as provided herein shall not relieve the Indemnifying Party of its obligations
under this Section 2.5 except to the extent that the Indemnifying Party is
adversely affected by such failure. The Indemnified Party may participate in
such defense at such Indemnified Party's expense; provided, however, that the
Indemnifying Party shall pay such expense if representation of such Indemnified
Party by the counsel retained by the Indemnifying Party would be inappropriate
due to actual or potential differing interests between the Indemnified Party and
any other party represented by such counsel in such proceeding; provided further
that in no event shall the Indemnifying Party be required to pay the expenses of
more than one law firm per jurisdiction as counsel for the Indemnified Party.
The Indemnifying Party also shall be responsible for the expenses of such
defense if the Indemnifying Party does not elect to assume such defense. No
Indemnifying Party, in the defense of any such claim or litigation shall, except
with the consent of each Indemnified Party, consent to entry of any judgment or
enter into any settlement which does not include as an unconditional term
thereof the giving by the claimant or plaintiff to such Indemnified Party of a
release from all liability in respect of such claim or litigation, and no
Indemnified Party shall consent to entry of any judgment or settle such claim or
litigation without the prior written consent of the Indemnifying Party, which
consent shall not be unreasonably withheld.

          (d) In order to provide for just and equitable contribution in
circumstances in which the indemnification provided for in this Section 2.5 is
due in accordance with its terms but for any reason is held to be unavailable to
an Indemnified Party in respect to any losses, claims, damages and liabilities
referred to herein, then the Indemnifying Party shall, in lieu of indemnifying
such Indemnified Party, contribute to the amount paid or payable by such
Indemnified Party as a result of such losses, claims, damages or liabilities to
which such party may be subject in such proportion as is appropriate to reflect
the relative fault of the Company on the one hand and the Selling Stockholders
on the other in connection with the statements or omissions which resulted in
such losses, claims, damages or liabilities, as well as any other relevant
equitable considerations. The relative fault of the Company and the Selling
Stockholders shall be determined by reference to, among other things, whether
the untrue or alleged untrue statement of material fact related to information
supplied by the Company or the Selling Stockholders and the parties' relative
intent, knowledge, access to information and opportunity to correct or prevent
such statement or omission. The Company and the Stockholders agree that it would
not be just and equitable if contribution pursuant to this Section 2.5 were
determined by pro rata allocation or by any other method of allocation which
does not take account of the equitable considerations referred to above.
Notwithstanding the provisions of this Section 2.5(d), (a) in no case shall any
one Selling Stockholder be liable or responsible for any amount in excess of the
net proceeds received by such Selling Stockholder from the offering of
Registrable Shares and (b) the Company shall be liable and responsible for any
amount in excess of such proceeds; provided, however, that no person guilty of
fraudulent misrepresentation (within the meaning of Section 11(f) of the

                                       9
<PAGE>

Securities Act) shall be entitled to contribution from any person who was not
guilty of such fraudulent misrepresentation. Any party entitled to contribution
will, promptly after receipt of notice of commencement of any action, suit or
proceeding against such party in respect of which a claim for contribution may
be made against another party or parties under this Section 2.5(d), notify such
party or parties from whom contribution may be sought, but the omission so to
notify such party or parties from whom contribution may be sought shall not
relieve such party from any other obligation it may have thereunder or otherwise
under this Section 2.5(d). No party shall be liable for contribution with
respect to any action, suit, proceeding or claim settled without its prior
written consent, which consent shall not be unreasonably withheld.

          2.6  Other Matters with Respect to Underwritten Offerings.  In the
event that Registrable Shares are sold pursuant to a Registration Statement in
an underwritten offering pursuant to Section 2.1, the Company agrees to enter
into an underwriting agreement containing customary representations and
warranties with respect to the business and operations of the Company and
customary covenants and agreements to be performed by the Company, including
without limitation customary provisions with respect to indemnification by the
Company of the underwriters of such offering.

          2.7  Information by Holder.  Each Selling Stockholder shall furnish to
the Company such information regarding such Selling Stockholder and the
distribution proposed by such Selling Stockholder as the Company may reasonably
request in writing and as shall be required in connection with any registration,
qualification or compliance referred to in this Agreement.

III. General.

          3.1  Severability.  The invalidity or unenforceability of any
provision of this Agreement shall not affect the validity or enforceability of
any other provision of this Agreement.

          3.2  Specific Performance.  In addition to any and all other remedies
that may be available at law in the event of any breach of this Agreement, each
Purchaser shall be entitled to specific performance of the agreements and
obligations of the Company hereunder and to such other injunctive or other
equitable relief as may be granted by a court of competent jurisdiction.

          3.3  Transfers of Rights.  The rights and obligations of the
Purchasers under Section 2 may be assigned by either Purchaser to any person or
entity that acquires shares of Common Stock having an aggregate value of at
least $2,500,000 (as adjusted in stock splits and similar events) from such
Purchaser. In the event of any such assignment, the assignee must provide
written notice of such assignment to the Company and agree in writing to be
bound by the applicable provisions of this Agreement.

                                       10
<PAGE>

          3.4  Governing Law.  This Agreement shall be governed by and construed
in accordance with the laws of the state of New York.

          3.5  Notices.  All notices, requests and other communications to any
party hereunder shall be in writing (including prepaid overnight courier,
facsimile transmission or similar writing) and shall be given to such party at
its address or facsimile number set forth below or at such other address or
facsimile number as such party may hereafter specify for the purpose by notice
to the Company.

If to the Company to:               NaviSite, Inc.
                                    400 Minuteman Road
                                    Andover, MA 01810
                                    Attention: General Counsel
                                    Facsimile: (978) 682-8100

If to CFS to:                       Compaq Financial Services Corporation
                                    420 Mountain Avenue
                                    Murray Hill, NJ 07974
                                    Attention: General Counsel
                                    Facsimile: (908) 898-4137

With a copy to:                     Davis Polk & Wardwell
                                    450 Lexington Avenue
                                    New York, New York  10017
                                    Attention: Chris Mayer
                                    Fax: (212) 450-4800

If to CMGI to:                      CMGI, Inc.
                                    100 Brickstone Square
                                    Andover, MA 01810
                                    Attention: General Counsel
                                    Facsimile: (978) 684-3601

With a copy to:                     Hale and Dorr LLP
                                    60 State Street
                                    Boston, MA 02109
                                    Attention: Mark G. Borden, Esq.
                                    Facsimile: (617) 526-5000

Each such notice, request or other communication shall be effective (i) when
delivered to such party at its address specified above, (ii) when sent to such
party by facsimile, addressed to it at its facsimile number specified above, and
such party sends back an electronic confirmation of receipt, or (iii) ten days
after being

                                       11
<PAGE>

sent to such party by certified or registered United States mail, addressed to
it at its address specified below, with first class or airmail postage.

          3.6  Complete Agreement.  This Agreement constitutes the entire
agreement and understanding of the parties hereto with respect to the subject
matter hereof and supersedes all prior agreements and understandings relating to
such subject matter.

          3.7  Amendments and Waivers.  Any term of this Agreement may be
amended or terminated and the observance of any term of this Agreement may be
waived (either generally or in a particular instance and either retroactively or
prospectively) with the written consent of the Company and the Purchasers.

          3.8  Pronouns.  Whenever the context may require, any pronouns used in
this Agreement shall include the corresponding masculine, feminine or neuter
forms, and the singular form of nouns and pronouns shall include the plural, and
vice versa.

          3.9  Counterparts; Facsimile Signatures.  This Agreement may be
executed in two counterparts, each of which shall be deemed to be an original,
and both of which together shall constitute one and the same document. This
Agreement may be executed by facsimile signatures.

          3.10 Section Headings.  The section headings are for the convenience
of the parties and in no way alter, modify, amend, limit or restrict the
contractual obligations of the parties.

                                       12
<PAGE>

          IN WITNESS WHEREOF, the parties hereto have executed this Agreement as
of the date first written above.

                                  NAVISITE, INC.

                                  By:  /s/ Patricia Gilligan
                                      ---------------------------------
                                      Name: Patricia Gilligan
                                      Title: Chief Executive Officer

                                  COMPAQ FINANCIAL SERVICES
                                    CORPORATION

                                  By:  /s/ Edward W. Andrews, Jr.
                                      ---------------------------------
                                      Name: Edward W. Andrews, Jr.
                                      Title: Vice President and Managing
                                             Director

                                  CMGI, INC.

                                  By:  /s/ George A. McMillan
                                      ---------------------------------
                                      Name:
                                      Title:

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