<PAGE>

                                                                   EXHIBIT 10.YY



February 12, 2000

John Lyons
66 Vine Road
Larchmont, NY  10538

Dear John:

This letter evidences the agreement between you and CompuCom Systems, Inc.
("CompuCom"), effective as of the date of your acceptance as indicated by your
signature on the last page hereof, as to the following matters:

     1.   Termination of Employment:  Effective as of the close of business on
          --------------------------
          January 14, 2000, you resigned your position as an officer of
          CompuCom.  You and CompuCom mutually, willingly and voluntarily
          terminated your employment relationship effective January 14, 2000.

          (a)  Continuation Pay: Subject to the limitations of, and in
               ----------------
               consideration of this agreement, you will receive payments of
               $10,576.92 bi-weekly through January 14, 2001. All future
               payments in consideration of this agreement will cease
               immediately upon your accepting employment of any kind with any
               company considered to be a competitor of CompuCom and will also
               cease if you become an owner or shareholder (more than 5%),
               director, lender or consultant to any entity considered to be a
               competitor of CompuCom. It is your responsibility to notify
               CompuCom when you obtain a new position. You further agree not to
               disparage or otherwise criticize CompuCom, its officers,
               directors, employees, shareholders, affiliates, agents or
               representatives.

          (b)  Stock Options: All unvested stock options will be terminated as
               -------------
               of January 14, 2000.

     2.   Benefits:  Current medical and dental insurance benefits will extend
          --------
          through January 14, 2001 or until alternate employment is obtained and
          medical and dental coverage is available through a new employer. All
          other benefits will end January 14, 2000.

     3.   COBRA: Commencing January 14, 2001, you may elect to continue your
          -----
          medical insurance through COBRA for up to eighteen (18) months.
          CompuCom will provide you with the forms pursuant to which you can
          elect to continue this coverage. If you elect to continue your current
          medical coverage through COBRA, you will be responsible for paying the
          cost of such continuing coverage.

     4.   Solicitation of CompuCom Employees:  In consideration of this
          ----------------------------------
          agreement, you agree that for a period of one year following the
          termination date, you will not, either voluntarily or otherwise, for
          yourself or on behalf of any other person, partnership or corporation,
          solicit for employment or employ any employee of CompuCom or any of
          its affiliates.
<PAGE>

Page 2
January 24, 2000
John Lyons



     5.   Solicitation of CompuCom Customers: Until after January 14, 2001, one
          ----------------------------------
          year after the termination of my employment, I agree that I will not
          directly or indirectly solicit, entice or induce any Customer to
          become a client, customer, OEM distributor or reseller of any other
          person, firm or corporation with respect to products and/or services
          then sold or under development by CompuCom or to cease doing business
          with CompuCom, and I shall not approach any such person, firm or
          corporation for such purpose or authorize or knowingly approve the
          taking of such actions by any other person.  For purposes of this
          paragraph, Customer means any person or entity which at the time of
          termination shall be, or shall have been within two (2) years prior to
          such time, a client, customer, OEM, distributor or reseller of the
          company or any current customer of CompuCom, including customers
          acquired in the TASD acquisition and those TASD customers currently on
          the "Protected List".

     6.   Confidential Information: You recognize and agree that documents,
          ------------------------
          files, records, data and other information developed and acquired by
          CompuCom and its affiliates as to which you have had access constitute
          "trade secrets" under applicable law and that under no circumstances
          or for any reason will you utilize such confidential business
          information, and such confidential business information shall remain
          the sole property of CompuCom and its affiliates. You further agree to
          keep confidential and not use or disclose to any third party without
          the prior written consent of CompuCom any confidential information
          known or possessed by you pertaining to CompuCom, its past and present
          officers, directors, agents, employees, attorneys, representatives,
          affiliates, predecessors, successors and assigns, if any, including,
          without limitation all documents, memoranda, records, reports, notes,
          notebooks, manuals, business plans, data, written information,
          computer information, tapes, film and other material of any kind
          containing or comprising confidential information in your possession
          or control, all of which you acknowledge to be the exclusive property
          of CompuCom and agree to deliver to CompuCom on or prior to the
          effective date of this Agreement.

     7.   Release:  You do hereby for yourself and for your heirs,
          --------
          representatives, executors,  administrators, successors and assigns
          irrevocably and unconditionally waive, release and forever discharge
          CompuCom and its past, present and future officers, directors, agents,
          employees, attorneys, representatives, affiliates, predecessors,
          successors and assigns, if any, together with any employee benefit
          plan sponsored by any such person, corporation or other entity, and
          any fiduciary of any such employee benefit plan (hereinafter referred
          to as "Releasees"), and each of them, from any and all claims,
          obligations, rights of action, suits, agreements, damages, attorneys'
          fees, costs and all other liabilities of any kind or description
          whatsoever, either in law or in equity, whether known or unknown,
          suspected or unsuspected, from the beginning of time to the date of
          execution hereof.  This release specifically includes, but is not
          limited to, all claims arising out of or related in any manner to your
          employment with CompuCom or any of its affiliates, your claims, if
          any, under Title VII of the Civil Rights Act of 1964 (42 U.S.C.
          (S)2000(e), et seq), the Age Discrimination in Employment Act of 1967,
                      -- ---
          as amended (29 U.S.C. (S) 621, et seq) (the "ADEA"), including the
                                         -- ---
          Older Workers' Benefits Protection Act of 1990 amendment to the ADEA,
          the Americans With Disabilities Act of 1990 (42 U.S.C. (S) 12101, et
                                                                            --
          seq), the Employee Retirement Income Security Act (29
          ----
<PAGE>

Page 3
January 24, 2000
John Lyons



          U.S.C. (S) 1140), and the Texas Commission on Human Rights Act (as
          codified in the Texas Labor Code), or any claim for wrongful
          discharge or other violation of public policy, or any claim for breach
          of contract, or for claims for alleged libel, slander, or defamation
          of character, or any other claim based on your employment.  You
          further agree not to file a claim or suit of any kind against
          CompuCom, or any of its affiliates, their respective officers, agents
          or representatives, past or present, relating to your employment or to
          participate voluntarily in any employment related claim brought by any
          party against CompuCom or any of its affiliates.  You expressly
          acknowledge that you are unaware of any fact that would provide a
          basis for any claim, liability or cause of action against Releases
          that you are waiving and releasing under this Section .

     8.   No Compensation Owing:  You expressly acknowledge that, as of the date
          ----------------------
          of this letter, you have received all wages, commissions and/or other
          compensation of any kind owed to you by CompuCom except as otherwise
                                                           -------------------
          provided for in this letter.  Additionally you agree that as of the
          ----------------------------
          effective date of this agreement, all CompuCom property, including
          computer hardware, software, pagers, cell phones, keys, access badges,
          travel cards, credit cards, etc. has been returned to CompuCom and
          will not be used by you and that any debt owed to CompuCom by you has
          been settled.  You also expressly acknowledge that all confidential
          information of any kind has been returned to CompuCom and that you
          have not retained paper copies, data files, electronic data, etc. of
          any CompuCom proprietary or confidential information.

     9.   Non-Disclosure:  You agree that you will not disclose, other than
          --------------
          under mandate of a court of competent jurisdiction or governmental
          agency, to any person other than confidentially to your immediate
          family, financial advisor and attorney any provision of this letter.

     10.  Binding Effect:  The terms of this letter shall be binding upon you,
          --------------
          your heirs, beneficiaries, administrators, executors, successors and
          assignees and upon CompuCom and its respective successors and
          assignees.

     11.  Entire Agreement: The terms of this letter constitute the entire
          -----------------
          agreement of the parties regarding the subject matter hereof, and any
          and all prior and contemporaneous statements, representations,
          negotiations, commitments or agreements, oral or written, relating to
          the subject matter contained in this letter are merged herein and
          superseded hereby and are of no legal force or effect whatsoever.

<PAGE>

Page 4
January 24, 2000
John Lyons



     12.  Miscellaneous:
          --------------

          (a)  You acknowledge that the terms of this letter not only are
               understandable, but that they are fully understood by you.

          (b)  You acknowledge that you have 21 days to review this agreement
               before executing; that CompuCom advised you in writing to consult
               with an attorney before executing this letter; that you had an
               adequate opportunity to review this letter with an attorney, that
               you fully understand its terms; that you were not coerced into
               signing this letter, and that you have signed this letter
               knowingly and voluntarily.

          (c)  In order to revoke the terms of this letter, you must notify Dave
               Loeser, Sr. VP Human Resources, of CompuCom, in writing, of your
               decision to revoke; and such notice must be received within 7
               days of the execution date of this agreement.

If this letter correctly sets forth our agreements with respect to the subject
matter hereof, please indicate your acceptance in the space provided below and
return one copy to Dave Loeser whereupon it shall constitute a binding agreement
between you and CompuCom.  If this letter is not executed by you and delivered
to CompuCom on or before Monday, February 7, 2000 the provisions hereunder shall
be null and void, having no force or effect.

Sincerely,


COMPUCOM SYSTEMS, INC.                                   ACCEPTED AND AGREED TO


By: /s/David A. Loeser                                   /s/John Lyons
    -------------------                                  ----------------------
                                                         John Lyons
the 24th day of January, 2000


Its: Sr. Vice President, Human Resources           Date:  February 4, 2000