VANSTAR CORPORATION

                                  INACOM CORP.

                                       AND

                            WILMINGTON TRUST COMPANY
                                   as Trustee





                          FIRST SUPPLEMENTAL INDENTURE

                          Dated as of February 17, 1999





                          FIRST SUPPLEMENTAL INDENTURE

         FIRST  SUPPLEMENTAL  INDENTURE,  dated as of February 17,  1999,  among
Vanstar  Corporation,  a Delaware  corporation (the "Company"),  InaCom Corp., a
Delaware  corporation  ("InaCom"),  and  Wilmington  Trust  Company,  a Delaware
banking corporation, as trustee ("Trustee"). Terms not defined herein shall have
the meanings assigned to them in the Indenture (as defined below).

                                 R E C I T A L S

         WHEREAS, the Company and the Trustee are parties to an Indenture, dated
as of  October  2, 1996 (the  "Indenture"),  relating  to the  Company's  6 3/4%
Convertible Subordinated Debentures due 2016 (the "Securities").

         WHEREAS, on February 17, 1999, a wholly-owned  subsidiary of InaCom was
merged  with  and  into  the  Company  with  the  Company  being  the  surviving
corporation  in the merger (the "Merger") and each  outstanding  share of common
stock of the  Company  (other than shares held by InaCom or any of its direct or
indirect  subsidiaries) was converted into the right to receive .64 of the fully
paid and nonassessable  shares of InaCom common stock, par value $0.10 per share
("InaCom Common Stock").

         WHEREAS,  InaCom desires to become jointly and severally liable for and
assume  all of the  obligations  of the  Company  under  the  Indenture  and the
Securities.

         WHEREAS,  Section 901 of the Indenture provides that the Company,  when
authorized by a Board Resolution,  and the Trustee may enter into a supplemental
indenture,  without the  consent of any Holder,  to,  among other  things,  make
provision  with  respect to the  conversion  rights of Holders  pursuant  to the
requirements of Article Thirteen of the Indenture.

         WHEREAS,  the Company and the Trustee have  determined  that this First
Supplemental  Indenture  complies with Section 901 of the Indenture and does not
require  the  consent of any Holders  and,  on the basis of the  foregoing,  the
Trustee  has  determined  that  this  First  Supplemental  Indenture  is in form
satisfactory to it.

                              W I T N E S S E T H:

         NOW THEREFORE, for and in consideration of the premises, it is mutually
covenanted  and agreed,  for the equal and ratable  benefit of the  Holders,  as
follows:

                                    ARTICLE 1
                            ASSUMPTION OF OBLIGATIONS

         Section 1.1 Assumption. InaCom hereby unconditionally assumes joint and
several  liability on and after the Effective Date (as defined below) for all of
the obligations of the Company under the Indenture and the Securities, including
the punctual payment when due,  whether at stated  maturity,  by acceleration or
otherwise,  of the principal of, premium, if any, and interest on the Securities
according  to the terms of the  Securities  and as more fully  described  in the
Indenture.  Notwithstanding  the foregoing,  the Company shall remain  obligated
under the Indenture  and the  Securities,  in  accordance  with the terms of the
Indenture. "Effective Date" shall mean February 17, 1999.

                                    ARTICLE 2
                         CONVERSION RIGHTS OF HOLDERS IN
                           CONNECTION WITH THE MERGER

         Section  2.1  Conversion   Rights.   The  Company,   as  the  surviving
corporation of the Merger,  and InaCom hereby provide in accordance with Section
1304 of the  Indenture  that the  Holder  of each  Security  outstanding  at the
Effective  Time of the  Merger  shall have the  right,  during  the period  such
Security shall be convertible as specified in Section 1301 of the Indenture,  to
convert  such  Security  only into that number of shares of InaCom  Common Stock
equal to the  product  of .64 and the  number of  shares of common  stock of the
Company into which such Security would have been  convertible  into  immediately
prior to the Merger.

                                    ARTICLE 3
                               GENERAL PROVISIONS

         Section 3.1  Incorporation  of  Indenture.  All the  provisions of this
First  Supplemental  Indenture shall be deemed to be incorporated in, and made a
part of, the Indenture;  and the Indenture,  as supplemented and amended by this
First Supplemental Indenture,  shall be read, taken and construed as one and the
same instrument.

         Section 3.2 Headings. The headings of the Articles and Sections of this
First Supplemental Indenture are inserted for convenience of reference and shall
not be deemed to be a part thereof.

         Section  3.3  Counterparts.  The First  Supplemental  Indenture  may be
executed  in any  number of  counterparts,  each of which so  executed  shall be
deemed to be an original,  but all such counterparts  shall together  constitute
but one and the same instrument.

         Section 3.4 Conflict with Trust Indenture Act. If any provision  hereof
limits,  qualifies or conflicts with another  provision hereof which is required
to be included in this First Supplemental  Indenture by any of the provisions of
the Trust Indenture Act, such required provision shall control.

         Section 3.5  Successors.  All  covenants  and  agreements in this First
Supplemental Indenture by the Company and InaCom shall be binding upon and inure
to benefit of their respective successors.  All covenants and agreements in this
First  Supplemental  Indenture by the Trustee shall be binding upon and inure to
the benefit of its successors.

         Section 3.6  Separability  Clause.  In case any provision in this First
Supplemental Indenture shall be invalid, illegal or unenforceable, the validity,
legality and enforceability of the remaining  provisions shall not in any way be
affected or impaired thereby.

         Section 3.7 Benefits of First Supplemental  Indenture.  Nothing in this
First  Supplemental  Indenture,  express or  implied,  shall give to any person,
other than the parties  hereto and their  successors  hereunder and the Holders,
any benefit or any legal or  equitable  right,  remedy or claim under this First
Supplemental Indenture.


                            [Signature Page Follows]






         IN  WITNESS  WHEREOF,   the  parties  hereto  have  caused  their  duly
authorized officers to execute and deliver this First Supplemental Indenture, as
of the date first above written.


                             VANSTAR CORPORATION

                    By:          /s/ Kauko Aronaho
                                 -----------------------------------------------
                    Name:        Kauko Aronaho
                                 -----------------------------------------------
                    Title:       Jr. VP & CFO
                                 -----------------------------------------------




                             INACOM CORP.


                    By:          /s/ Bill L. Fairfield
                                 -----------------------------------------------
                    Name:        Bill L. Fairfield
                                 -----------------------------------------------
                    Title:       President and Chief Executive Officer
                                 -----------------------------------------------



WILMINGTON TRUST COMPANY

By:          /s/ Bruce L. Bisson
             --------------------------------------
Name:        Bruce Bisson
             --------------------------------------
Title:       Vice President
             --------------------------------------