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                                                                    EXHIBIT 10.3

                                                                       Exhibit A

                              AMENDED AND RESTATED
                              THORATEC CORPORATION
                        RESTRICTED STOCK GRANT AGREEMENT

This Amended and Restated Thoratec Corporation Restricted Stock Grant Agreement
("Agreement") amends and restates the Restricted Stock Grant Agreement (the
"Existing Agreement") between Thoratec Corporation (the "Company") and M. Wayne
Boylston ("Consultant").

WHEREAS, Consultant was previously an employee of the Company, and in accordance
with his employment, he was granted 50,000 shares of Common Stock of the Company
(the "Restricted Shares") pursuant to the Company's 1997 Employee Stock Option
Plan, as amended (the "Plan"), and the Thoratec Corporation Restricted Stock
Grant Agreement, effective as of August 13, 2002 (the "Existing Agreement"); and

WHEREAS, Consultant has resigned from the Company effective December 17, 2004
prior to any of the restrictions on the Restricted Shares having lapsed or
otherwise accelerated in accordance with the Existing Agreement; and

WHEREAS, in accordance with the terms of the Existing Agreement, Consultant has
forfeited all rights and interest in and to the Restricted Shares; and

WHEREAS, the Company and Consultant have entered into a Consulting Services
Agreement of even date herewith (the "Consulting Services Agreement") for the
provision of certain "Services" defined therein; and

WHEREAS, as consideration for Consultant's performance of Services as defined in
the Consulting Services Agreement, the Company desires to permit the continued
vesting by Consultant in certain of the Restricted Shares subject to the terms
and conditions set forth herein.

NOW THEREFORE, the Existing Agreement is hereby amended and restated to read in
its entirety as follows:

         1. FORFEITURE OF RESTRICTED SHARES AND GRANT OF SHARES. Consultant
         hereby agrees to his irrevocable forfeiture of 25,000 Restricted Shares
         granted pursuant to the Existing Agreement. Consultant shall retain
         25,000 Restricted Shares, subject to the vesting and other provisions
         of this Agreement. This Agreement supersedes, in all respects, the
         Existing Agreement, which shall no longer have any legal effect
         whatsoever.

         2. FORFEITURE AND TRANSFER RESTRICTIONS.

                  a. Restrictions.

                           (i) If the Consulting Agreement is terminated for the
         reasons set forth in Section 4(a)(i) or 4(a)(iv) thereof, or as the
         result of the death or disability of Consultant, all

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         Restricted Shares as to which restrictions set forth herein have not
         then lapsed pursuant to Section 2(b) or Section 3(a) hereof will be
         forfeited by Consultant and will return to the Company (the
         "Forfeiture"). Consultant will not be permitted to sell, assign, pledge
         or otherwise encumber any Restricted Shares until there is no longer a
         possibility of Forfeiture with respect thereto (such restriction,
         together with the potential Forfeiture, referred to as the
         "Restrictions").

                           (ii) If the Consulting Agreement is terminated for
         the reasons set forth in Section 4(a)(ii), 4(a)(iii) or 4(a)(v)
         thereof, the Restrictions will lapse with respect to all remaining
         Restricted Shares as to which restrictions set forth herein have not
         then lapsed.

                  b. Lapse of Restrictions. Except as otherwise provided in
         Section 2(a)(ii) or Section 3 hereof, the Restrictions will lapse with
         respect to 8,333 Restricted Shares on January 1, 2006, with respect to
         8,333 Restricted Shares on January 1, 2007 and with respect to 8,334
         Restricted Shares on January 1, 2008, provided that on each such
         lapsing date Consultant's services to the Company pursuant to the
         Consulting Agreement are continuing.

                  c. Rights to Surrendered Shares. If any Restricted Shares are
         Forfeited as provided herein, such shares will be immediately
         surrendered to the Company, and Consultant will have no further rights
         with respect to such shares.

         3. CHANGE OF CONTROL.

                  a. Change of Control. Upon a Change of Control Transaction in
         which shares of the Company's common stock are (or are deemed to be)
         converted into the capital stock of a third party entity (the
         "Converted Shares"), then all of the Restricted Shares shall be
         converted into the Converted Shares on the same basis as all other
         Company common stock; provided, however, that the Restrictions shall
         remain in effect and be applicable to the pro-rata number of Converted
         Shares on the same terms set forth herein. As used herein, a "Change of
         Control Transaction" shall mean a merger, consolidation, reorganization
         or similar transaction in which holders of the Company's stock hold,
         after the consummation thereof, less than a majority of the total
         outstanding voting shares of the other party to such transaction; or a
         sale by the Company of all or substantially all of its assets in any
         one or series of related transactions to a third party.

                  b. Reclassification, Merger, etc. This Agreement will not
         affect the right of the Company to engage in any Change of Control
         Transaction (as defined above), or to adjust, reclassify, reorganize or
         otherwise change its capital or business structure, dissolve, liquidate
         or sell or transfer all or any part of its business or assets.

         4. RIGHTS AS A SHAREHOLDER; CASH DIVIDENDS. Consultant will have full
         rights as a shareholder with respect to the Restricted Shares, whether
         or not the Restrictions have lapsed with respect to such shares, to the
         extent that the relevant Restricted Shares have not been Forfeited as
         provided herein, including without limitation the right to vote the
         Restricted Shares and to receive any dividends paid on the Restricted
         Shares.

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         5. STOCK DIVIDENDS AND RELATED MATTERS. Any new, substituted or
         additional securities or other property (including money paid other
         than as a regular cash dividend) which Consultant may have the right to
         receive, by reason of any stock dividend, stock split,
         recapitalization, combination of shares, exchange of shares or other
         change affecting the outstanding common stock, as a class, without the
         Company's receipt of consideration, with respect to any Restricted
         Shares which remain subject to the Restrictions, will be issued subject
         to the same Restrictions applicable to any Restricted Shares which
         remain subject to the Restrictions, with any securities of the Company
         ceasing to be Restricted Shares on a pro rata basis as to thirty three
         and one-third percent (33 1/3%) of such additional securities on each
         of January 1, 2006, January 1, 2007 and January 1, 2008, respectively,
         under the conditions set forth in Section 2(b) hereof.

         6. CERTIFICATE; LEGENDS.

                  a. Legend. All certificates representing the Restricted Shares
         will bear the following legend:

                           i.       "THE SECURITIES REPRESENTED HEREBY MAY BE
                                    SUBJECT TO FORFEITURE TO THE COMPANY
                                    PURSUANT TO THE PROVISIONS OF AN AGREEMENT
                                    BETWEEN THE COMPANY AND THE ORIGINAL
                                    PURCHASER OF SUCH SECURITIES, SHOULD THE
                                    PERSON INITIALLY ISSUED THESE SECURITIES
                                    CEASE TO BE INVOLVED WITH THE COMPANY OR ANY
                                    AFFILIATE THEREOF, AND SUCH SECURITIES MAY
                                    NOT BE SOLD OR OTHERWISE TRANSFERRED IF SUCH
                                    SECURITIES ARE SUBJECT TO SUCH RISK OF
                                    FORFEITURE.

                           ii.      THE HOLDER OF THESE SECURITIES MAY BE AN
                                    AFFILIATE OF THE ISSUER HEREOF WITHIN THE
                                    MEANING OF PARAGRAPH (A)(1) OF RULE 144
                                    PROMULGATED UNDER THE SECURITIES ACT OF
                                    1933, AS AMENDED."

                  b. Lapse of Restrictions. One or more certificates
         representing the Restricted Shares will be issued in Consultant's name
         and held by the Secretary of the Company until all restrictions on the
         Restricted Shares have lapsed. When restrictions have lapsed on the
         Restricted Shares, certificates for such Restricted Shares will be
         delivered to Consultant upon his request.

         7. TAX CONSEQUENCES.

                  a. Tax Advisor. Consultant acknowledges that the tax
         consequences associated with the Restricted Shares and this Agreement
         are complex and depend upon Consultant's particular circumstances and
         that the Company has urged Consultant to consult a tax advisor. By
         executing this Agreement, Consultant acknowledges that Consultant has
         retained, or has had the opportunity to retain, his own advisor(s) to
         provide tax advice to him as to such matters and as to this Agreement,
         and neither the Company nor any of its employees, representatives or
         advisors has given Consultant any tax advice regarding the Restricted
         Shares or this Agreement and Consultant has not relied on any
         representations of the Company or any of its employees, representatives
         or advisors on that subject.

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                  b. Withholding Tax. Consultant is an independent contractor
         and not an employee of the Company. Therefore, Consultant is
         responsible for the payment of any withholding or employment taxes
         which, in the good-faith judgment of the Company, result from the
         purchase of the Restricted Shares or the lapse of Restrictions thereon.

                  c. No Section 83(b) Election. Consultant represents and
         warrants to the Company that he has not made an election under Section
         83(b) of the Internal Revenue Code with respect to the Restricted
         Shares, and agrees that he will not make such an election with respect
         to the Restricted Shares.

         8.   SUCCESSORS AND ASSIGNS. Except to the extent otherwise provided
              herein, the provisions of this Agreement will inure to the benefit
              of, and be binding upon, the Company and its successors and
              assigns and Consultant, Consultant's assigns and the legal
              representatives, heirs, beneficiaries, executors and
              administrators and legatees of Consultant's estate.

         9.   NOTICES. Any notice required or permitted to be given or made
              under this Agreement by either of the parties to the other will be
              in writing, delivered personally or by facsimile (and promptly
              confirmed by personal delivery, first class mail or courier),
              first class mail or courier, postage prepaid (where applicable),
              addressed to such other party at its relevant address, which for
              the Company will be the address and facsimile number of its
              principal office, and for Consultant will be the address and
              facsimile number set forth below Consultant's signature on this
              Agreement, or to such other address as the addressee has last
              furnished in writing to the addressor and will be effective and
              deemed given under this Agreement on the earliest of: (a) the date
              of personal delivery; (b) the date of delivery by facsimile; or
              (c) the next business day after deposit with a
              nationally-recognized courier or overnight service, including
              FedEx or Express Mail.

         10.  NO COMMITMENT. Nothing in this Agreement constitutes an agreement
              that Consultant will be retained by the Company for any term.

         11.  GOVERNING LAW; VENUE. This Agreement will be deemed to have been
              entered into and will be construed and enforced in accordance with
              the laws of the State of California without regard to principles
              of conflicts of laws. The parties hereby agree to submit to the
              exclusive jurisdiction of the courts of the State of California
              and the Federal courts of the United States of America located
              within the County of Alameda in the State of California for any
              action to enforce this Agreement. If either party brings an action
              to enforce the terms of this Agreement, the prevailing party shall
              be entitled to reasonable attorneys' fees and costs.
              Interpretation, performance and enforcement of this Agreement will
              be governed by the laws of the State of California without regard
              to its conflict-of-laws rules.

         12.  COUNTERPARTS. This Agreement may be executed by facsimile and in
              two counterparts, each of which will be deemed an original, and
              both of which together will constitute one and the same
              instrument.

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                                 THORATEC CORPORATION

                                 By: /s/ D. Keith Grossman
                                    _______________________
                                 Name:  D. Keith Grossman
                                 Title: Chief Executive Officer and President

                                           /s/ M. Wayne Boylston
                                           ______________________
                                           M. WAYNE BOYLSTON

                                           Address:  *
                                                     *

                                           Telephone Number:________________

                                           Facsimile Number:________________

                           I, as the Consultant's spouse, also accept and agree
                         to be bound by the terms and conditions of this
                         Agreement.

                       i.____________________________________________
                                       Signature

                          Printed name:______________________________

                       ii. Date signed:___________, 200__

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                                                                    EXHIBIT 4.01

                        AMENDMENT TO THE RIGHTS AGREEMENT

         THIS AMENDMENT TO THE RIGHTS AGREEMENT (this "Amendment"), dated as of
December 15, 2004, is made by and between VERITAS Software Corporation, a
Delaware corporation (the "Company"), and Mellon Investor Services LLC (formerly
known as ChaseMellon Shareholder Services, L.L.C.), a New Jersey limited
liability company, as Rights Agent (the "Rights Agent"). The Company and the
Rights Agent may be individually referred to herein as a "Party" and,
collectively, as the "Parties."

                                   Background

         A. The Parties entered into a Rights Agreement, dated as of June 16,
1999 (the "Rights Agreement"). Capitalized terms not otherwise defined herein
shall have the meaning ascribed to such terms in the Rights Agreement.

         B. The Company, Symantec Corporation, a Delaware corporation
("Parent"), and Carmel Acquisition Corp., a Delaware corporation and a wholly
owned subsidiary of Parent ("Sub"), are entering into an Agreement and Plan of
Reorganization, dated as of the date hereof (as amended or supplemented from
time to time, the "Merger Agreement"), pursuant to which Sub, upon the terms and
subject to the conditions set forth therein, shall be merged with and into the
Company with the Company surviving the merger as a wholly owned subsidiary of
Parent.

         C. The Board of Directors of the Company has determined by resolution
that an amendment to the Rights Agreement as set forth herein is advisable and
in the best interests of the Company and its stockholders.

         D. Pursuant to Section 27 of the Rights Agreement, from time to time
the Company may, and the Rights Agent shall if the Company directs, from time to
time supplement and amend the Rights Agreement and the Company has so directed
the Rights Agent to join this Amendment.

                                      Terms

         In consideration of the mutual covenants contained herein and in the
Rights Agreement and intending to be legally bound hereby, the Parties agree as
follow:

                1. Amendment of Section 1. Section 1 of the Rights Agreement is
hereby supplemented and amended to add the following definitions in the
appropriate alphabetical locations:

                        "Merger" shall mean the "Merger" as such term is defined
         in the Merger Agreement.

                        "Merger Agreement" shall mean the Agreement and Plan of
         Reorganization, dated as of December 15, 2004, by and among the
         Company, Parent and Sub, as amended or supplemented from time to time.

                        "Parent" shall mean Symantec Corporation, a Delaware
         corporation.

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                        "Sub" shall mean Carmel Acquisition Corp., a Delaware
         corporation and a wholly owned subsidiary of Parent.

                2. Amendment of Definition of "Acquiring Person". The definition
of "Acquiring Person" in Section 1(a) of the Rights Agreement is hereby
supplemented and amended by adding the following at the end thereof:

                                    "(D)  neither Parent, Sub nor any of their
         respective Affiliates or Associates shall be deemed to be an Acquiring
         Person solely as a result of the approval, execution, delivery or
         performance of the Merger Agreement or the consummation of the Merger
         or any of the other transactions contemplated thereby."

                3. Amendment of Definition of "Shares Acquisition Date". The
definition of "Shares Acquisition Date" in Section 1(p) of the Rights Agreement
is supplemented and amended by inserting the following sentence at the end
thereof:

         "Notwithstanding anything in this Agreement to the contrary, a Shares
         Acquisition Date shall not be deemed to have occurred solely as the
         result of the public announcement, approval, execution, delivery or
         performance of the Merger Agreement or the consummation of the Merger
         or any of the other transactions contemplated thereby."

                4. Amendment to Section 3(a). Section 3(a) of the Rights
Agreement is hereby supplemented and amended by inserting the following sentence
immediately after the last sentence thereof:

         "Notwithstanding anything in this Agreement to the contrary, a
         Distribution Date shall not be deemed to have occurred solely by reason
         of the public announcement, approval, execution, delivery or
         performance of the Merger Agreement or the consummation of the Merger
         or any of the other transactions contemplated thereby."

                5. Amendment to Section 7(a). Section 7(a) of the Rights
Agreement is hereby supplemented and amended by deleting the word "or" that
immediately precedes clause (iii) and inserting the following clause at the end
of such Section 7(a):

         "or (iv) immediately prior to the Effective Time (as defined in the
         Merger Agreement)"

                6. Amendment to Section 25(a). Section 25(a) of the Rights
Agreement is hereby supplemented and amended by inserting the following sentence
immediately after the last sentence thereof:

         "Notwithstanding anything in this Agreement to the contrary, in no
         event shall the provisions of this Section 25 apply to the public
         announcement, approval, execution, delivery or performance of the
         Merger Agreement or the

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         consummation of the Merger or any of the other transactions
         contemplated thereby."

                7. Amendment to Section 26. Section 26 of the Rights Agreement
is hereby supplemented and amended by deleting the addresses of the Company and
the Rights Agent set forth therein and replacing them with the following,
respectively:

                          "VERITAS Software Corporation
                           350 Ellis Street
                           Mountain View, California 94043
                           Attention:  Corporate Secretary"

                           Mellon Investor Services LLC
                           235 Montgomery Street, 23rd Floor
                           San Francisco, California 94104
                           Attention:  Joseph W. Thatcher, Jr."

                8. Waiver of Notice(s). The Rights Agent and the Company hereby
waive any notice requirement(s) under the Rights Agreement pertaining to the
matters covered by this Amendment.

                9. Other Provisions Unaffected. This Amendment shall be deemed
to be in full force and effect immediately prior to the execution and delivery
of the Merger Agreement. Except as expressly modified herein, all arrangements,
agreements, terms, conditions and provisions of the Rights Agreement remain in
full force and effect, and this Amendment and the Rights Agreement, as hereby
modified, shall constitute one and the same instrument.

                10. Miscellaneous.

                a. Counterparts. This Amendment may be executed in any number of
counterparts and each of such counterparts shall for all purposes be deemed to
be an original, and all such counterparts shall together constitute but one and
the same instrument.

                b. Governing Law. This Amendment, the Rights Agreement, each
Right and each Right Certificate issued hereunder or thereunder shall be deemed
to be a contract made under the laws of the State of Delaware and for all
purposes shall be governed by and construed and in accordance with the laws of
such State applicable to contracts to be made and performed entirely within such
State.

                c. Further Assurances. Each Party shall cooperate and take such
action as may be reasonably requested by another Party in order to carry out the
provisions and purposes of this Amendment, the Rights Agreement, and the
transactions contemplated hereunder and/or thereunder.

                d. Descriptive Headings. Descriptive headings of the several
Sections of this Amendment and the Rights Agreement are inserted for convenience
only and shall not control or affect the meaning or construction of any of the
provisions hereof or thereof.

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                e. Entire Agreement. This Amendment and the Rights Agreement,
and all of the provisions hereof and thereof, shall be binding upon and inure to
the benefit of the Parties and their respective successors and permitted assigns
and executors, administrators and heirs. This Amendment, together with the
Rights Agreement, sets forth the entire agreement and understanding among the
Parties as to the subject matter hereof and merges with and supercedes all prior
discussions and understandings of any and every nature among them. Without
limiting the foregoing, the Rights Agent shall not be subject to, nor required
to interpret or comply with, or determine if any Person has complied with, the
Merger Agreement even though reference thereto may be made in this Amendment and
the Rights Agreement.

                f. Severability. If any term, provision, covenant or restriction
of this Amendment is held by a court of competent jurisdiction or other
authority to be invalid, void or unenforceable, then such term, provision,
covenant or restriction shall be enforced to the maximum extent permissible, and
the remainder of the terms, provisions, covenants and restrictions of this
Amendment shall remain in full force and effect and shall in no way be affected,
impaired or invalidated.

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         IN WITNESS WHEREOF, the Parties have executed this Amendment to the
Rights Agreement as the date first set forth above.

                                        VERITAS SOFTWARE CORPORATION

                                        By:  /s/ John F. Brigden
                                             -----------------------------------
                                        Name: John F. Brigden
                                        Title: Senior Vice President, General
                                               Counsel and Secretary

                                        MELLON INVESTOR SERVICES LLC

                                        By:  /s/ Joseph W. Thatcher, Jr.
                                             -----------------------------------
                                        Name:  Joseph W. Thatcher, Jr.
                                        Title: Vice President

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