CDW COMPUTER CENTERS, INC.


                             SECOND LEASE AMENDMENT


         THIS SECOND LEASE AMENDMENT is made as of the 15th day of April, 2001
by and between ORLEANS ILLINOIS VENTURE, an Illinois Limited Partnership, by IJM
Management Limited Partnership an Illinois Limited Partnership (hereinafter
referred to as "Landlord"), and CDW COMPUTER CENTERS, INC., an Illinois
corporation (hereinafter referred to as "Tenant").


                                   WITNESSETH:


         A. Landlord and Tenant entered into a lease date January 25, 1995, as
amended by Lease Amendment dated June 15, 1996 (hereinafter referred to as the
"First Amendment") whereby Landlord leased to Tenant certain premises
(hereinafter referred to as the "Premises") in the building located at 317 West
Grand Avenue, Chicago Illinois, for a term (hereinafter referred to as the
"Term") expiring February 28, 1999 (the aforesaid lease as so amended is
hereinafter referred to as the "Lease").

         B.     Tenant  desires to extend the Term and  Landlord  is willing to
extend the term as aforesaid on the terms and conditions hereinafter set forth.

         NOW, THEREFORE, in consideration of the mutual covenants herein and in
the Lease contained, and in consideration of the forgoing recitals which are
incorporated herein by this reference, is hereby agreed as follows:

         1.       Extension  of Term.  The  expiration  of the Term is hereby
extended  from June 30, 2001 to June 30, 2006 (hereinafter referred to as the
"Second Extended Term"), subject to paragraph 14 hereof.

         2. Monthly Base Rent for New Premises . Commencing on July 1, 2001,
(hereinafter referred to as the "New Deal Date") the Annual Base Rent and
Monthly Base Rent for the entire Premises during the Second Extended Term shall
be set forth in this paragraph 2. Tenant shall pay to Landlord Base Rent for the
Second Extended Term without set-off or deduction whatsoever in the amount of
One Million Seventy Four Thousand Four Hundred Eighty Seven Dollars and Thirty
Six Cents ($1,074,487.36) payable in monthly installments in the amount of the
applicable Monthly Base Rent set forth below on the New Deal Date and on the
first day of each and every month of the Second Extended Term:






                  (i) During the period commencing on July 1, 2001 and ending on
         June 30, 2002 the Annual Base Rent shall be One Hundred Ninety Eight
         Thousand Three Hundred Seventy Nine Dollars and Fifty Cents
         ($198,379.50) and the Monthly Base Rent shall be Sixteen Thousand Five
         Hundred Thirty One Dollars and Sixty Three Cents ($16,531.63).

                  (ii) During the period commencing on July 1, 2002 and ending
         on June 30, 2003 the Annual Base Rent shall be Two Hundred Six Thousand
         Three Hundred Fourteen Dollars and Sixty Eight Cents ($206,314.68) and
         the Monthly Base Rent shall be Seventeen Thousand One Hundred Ninety
         Two Dollars and Eighty Nine Cents ($17,192.89).

                  (iii) During the period commencing on July 1, 2003 and ending
         on June 30, 2004 the Annual Base Rent shall be Two Hundred Fourteen
         Thousand Five Hundred Sixty Seven Dollars and Twenty Seven Cents
         ($214,567.27) and the Monthly Base Rent shall be Seventeen Thousand
         Eight Hundred Eighty Dollars and Sixty One Cents ($17,880.61).

                  (iv) During the period commencing on July 1, 2004 and ending
         on June 30, 2005 the Annual Base Rent shall be Two Hundred Twenty Three
         Thousand One Hundred Forty Nine Dollars and Ninety Six Cents
         ($223,149.96) and the Monthly Base Rent shall be Eighteen Thousand Five
         Hundred Ninety Five Dollars and Eighty Three Cents ($18,595.83).

                  (v) During the period commencing on July 1, 2005 and ending on
         June 30, 2006 the Annual Base Rent shall be Two Hundred Thirty Two
         Thousand Seventy Five Dollars and Ninety Six Cents ($232,075.96), and
         the Monthly Base Rent shall be Nineteen Thousand Three Hundred Thirty
         Nine Dollars and Sixty Six Cents ($19,339.66).

         3.       Gross Rent.  Effective  on the New Deal Date:  (i)  paragraph
L of Section 1 of the Lease;  (ii) Section 2 of the Lease;  and (iii) paragraphs
11,12,13 of the Rider  attached to the Lease,  shall be no force or effect with
respect to the Second Extended Term and the Renewal Term (hereinafter defined).

         4.       Signs.  Effective  upon  full  execution  hereof,  paragraph 7
of the First  Amendment  shall be deleted and the following shall be inserted
in place thereof:

         "Tenant may, at its sole cost and expense, affix and maintain: (i) upon
         the west exterior wall of the building in which the Premises are
         located, a sign identifying Tenant, containing the logo of Tenant and
         containing an electronic message board.; and (ii) on the southern wall
         of the existing fitness center a sign identifying Tenant. Tenant shall
         maintain such signs in good order and repair during the Term and shall
         remove such sign at the end of the Term and shall replace and repair
         any damage caused by any such removal. Any such sign shall be in
         compliance with all applicable laws, statutes and ordinances and the
         erection of such sign shall be deemed a portion of the Tenant's Work as
         described in paragraph 5 hereof and shall comply in all respects with
         the provisions relating thereto."






         5. Termination. In the event that Tenant is not in default under the
terms of the Lease, as amended hereby, and no event has occurred which, with the
giving of notice or the passage of time, or both, would constitute an event of
default, Tenant shall have the right to cancel this Lease, effective on June 30,
2003, June 30, 2004 or June 30, 2005 (each such date is hereinafter referred to
as a "Cancellation Date"), which right may only be exercised by Tenant's
delivery of written notice (hereinafter referred to as the "Cancellation
Notice") to Landlord at least six (6) months prior to the applicable
Cancellation Date, which Cancellation Notice shall be accompanied by a certified
or cashier's check in the amount of: (i) Thirty Thousand Dollars and No Cents
($30,000.00) if the Lease is canceled effective June 30, 2003; (ii) Twenty
Thousand Dollars and No Cents ($20,000.00) if the Lease is canceled effective
June 30, 2004; or (iii) Ten Thousand Dollars and No Cents ($10,000.00) if the
Lease is canceled effective June 30, 2005, payable to Landlord as a fee for such
cancellation. The Cancellation Notice shall provide the applicable Cancellation
Date. In the event Tenant timely elects to cancel this Lease, Tenant shall
vacate the Premises in the condition required herein and shall pay to Landlord
all rent and any other sums that have accrued under the terms of this Lease up
to and including the Cancellation Date. The failure of Tenant to timely deliver
the Cancellation Notice or to pay the requisite sums in accordance with the
terms of this section shall preclude Tenant from exercising its option pursuant
to this Paragraph.

         6. Allowance. Landlord will provide a refurbishing allowance in the
amount of Twenty Thousand Dollars and No Cents ($20,000.00) (hereinafter
referred to as the Refurbishing Allowance") at the New Deal Date for the purpose
of re-carpeting and painting the Premises. The Refurbishing Allowance shall be
paid to Tenant no later than thirty (30) days after receipt by Landlord of all
documentation required by Landlord pursuant to Section 8 of the Lease and
Paragraph 5 of the First Amendment plus evidence of full payment for such
re-carpeting and painting the Premises.

         7.       Condition.  Tenant  accepts  the  Premises in its then as-is
condition  on the New Deal Date and acknowledges  that  Landlord  has made no
representation  with  respect to and shall not be responsible  for the condition
of the Premises.

         8. Brokers. Tenant and Landlord each represent and warrant to the other
that neither Tenant nor Tenant's officers or agents, nor any other person acting
on Tenant's behalf, nor Landlord, nor Landlord's officers or agents, nor any
other person acting on Landlord's behalf, as the case may be, has dealt with any
real estate broker other than CB Richard Ellis, Inc. (hereinafter referred to as
"CB") in the negotiation and making of this Amendment. Tenant and Landlord each
agree to indemnify and hold each other harmless from the claim or claims of any
other broker or brokers (other than CB) to the effect that it or they have
caused Tenant or Landlord, as the case may be, to enter into this Amendment.
Landlord shall pay or cause to be paid all commissions, consulting fees and any
other compensation, if any, owing to CB in connection with the making of this
Amendment in accordance with any separate lease commission or similar agreement
heretofore entered into between Landlord and CB.






         9. Binding Effect. Except as modified herein, the terms, conditions and
covenants of the Lease shall remain in full force and effect during the Second
Extended Term, and shall be binding upon and inure to the benefit of Landlord,
Tenant and their respective successors and permitted assigns. The paragraph
headings herein contained are for convenience and shall not be deemed to govern
or control the substance hereof. It is understood and agreed that all
understandings and agreements heretofore had between the parties hereto are
merged in the Lease as amended by this Second Lease Amendment which alone fully
and completely express their agreements, and that neither party is relying upon
any statement or representation, not embodied in the Lease as amended hereby,
made by the other. Each party expressly acknowledges that, except as expressly
provided in the Lease as amended hereby, the other party and the agents and
representatives of the other party have not made, and the other party is not
liable for or bound in any manner by, any express or implied warranties,
guaranties, promises, statements, inducements, representations or information
pertaining to the Premises. The preparation of this Second Lease Amendment has
been a joint effort of the parties hereto and the resulting documents shall not,
solely as a matter of judicial construction, be construed more severely against
one of the parties than the other.

         10.      Governing  Law. This Second Lease  Amendment shall be governed
and  construed  under the laws of the State of Illinois.

         11.      No  Default. Tenant hereby  warrants  that it is not presently
in  default  under the  Lease.  Landlord hereby warrants that it is not
presently in default under the Lease.

         12.      Inconsistency.  Except as modified  herein,  the terms,
conditions  and  covenants  of the Lease shall remain  unchanged  and otherwise
in full force and effect,  and are hereby  ratified and  reaffirmed.  In the
event of an inconsistency between this Second Amendment to Lease and the Lease,
the terms herein shall control.

         13. Representations and Acknowledgments. Tenant hereby acknowledges and
agrees that, to the best knowledge of Tenant, as of the date of this Second
Lease Amendment: (i) there are no offsets, defenses or counterclaims against
Landlord arising out of or in any way relating to the Lease; (ii) neither
Landlord nor Tenant is in default under or has breached the Lease; and (ii) the
Lease as amended hereby represents the entire agreement between the parties
thereto as to the Premises, and Tenant neither has nor claims any right or
interest in or under any contract, option or agreement involving the Premises.

         14. Renewal Option. Tenant shall have one (1) option (hereinafter
referred to as the "Renewal Option") to extend the Term of the Lease for all of
the Premises as of the expiration of the Second Extended Term, for an additional
period of five (5) years (hereinafter referred to as the "Renewal Term"), upon
the following terms and conditions:

                  (a) Tenant gives Landlord written notice of its exercise of
         the Renewal Option at least nine (9) months prior to the expiration of
         the Second Extended Term.






                  (b) Tenant is not in default under this Lease either on the
         date Tenant delivers the notice required under (a) above or at any time
         thereafter prior to the commencement of the Renewal Term.

                  (c) All of the terms and provisions of this Lease (except this
         paragraph 14 and except as otherwise provided in this Second Lease
         Amendment) shall be applicable to the Renewal Term, except that Annual
         Base Rent for the Renewal Term shall be equal to the Fair Value (as
         hereinafter defined). For purposes of this Lease, the "Fair Value"
         shall mean an annual amount per rentable square foot for a term
         equivalent to the period for which Fair Value is being determined
         beginning with the first (1st) day of the subject period that a
         willing, creditworthy, new non-equity tenant leasing comparable space
         would pay and a willing, comparable landlord of comparable space in the
         Chicago, Illinois/River North Area (hereinafter referred to as the
         "Market") would accept at arm's length, giving appropriate
         consideration to generally applicable terms and conditions prevailing
         for such comparable space. Should Tenant notify Landlord of its
         exercise of the Renewal Option, Landlord shall notify Tenant of
         Landlord's determination of Fair Value not later than ten (10) months
         prior to the expiration of the Second Extended Term. Should Tenant not
         object in writing to the determination of Fair Value made by Landlord
         within fourteen days of receipt thereof, the determination of Fair
         Value made by Landlord shall be binding on the parties. Should Tenant
         object in writing to the determination made by Landlord within said
         fourteen (14) day period, Fair Value shall be determined by an
         appraiser mutually agreed upon by the parties hereto, it being further
         agreed that each of the parties shall pay one-half of the fees of such
         appraiser; provided, however, that if the parties cannot agree upon an
         appraiser within ten (10) days following the date on which Tenant
         objects to the determination of Fair Value by the Landlord, Landlord
         shall, within seven (7) days after the expiration of said ten (10) day
         period advise Tenant of the names of three (3) appraisers acceptable to
         Landlord. Tenant shall within five (5) days of receipt of such list of
         appraisers choose one of such appraisers who shall be engaged to
         determine the Fair Value as described herein, it being further agreed
         that each of the parties shall pay one-half of the fees of such
         appraiser. In the event that Fair Value has not been determined by the
         date on which the Renewal Term commences, Tenant shall continue to pay
         Annual Base Rent in the amount payable immediately prior to the
         commencement of the Renewal Term and the amount of any difference
         between that amount and the Fair Value for that part of the Renewal
         Term for which Annual Base Rent was paid at the former rate shall be
         paid by or refunded to Tenant promptly following determination of the
         applicable new rate based on Fair Value. Any appraiser selected
         hereunder shall be a real estate broker who has at least seven (7)
         years experience leasing comparable properties in the Market.

                  (d)      Failure  to  exercise  the  Renewal  Option  shall be
deemed to be a waiver of  Tenant's right to exercise the Renewal Option.






                  (e) Tenant agrees to accept the Premises to be covered by this
         Lease during the Renewal Term in an "as is" physical condition and
         Tenant shall not be entitled to receive any allowance, credit,
         concession or payment from Landlord for the improvement thereof.

                  (f) The Renewal Option herein granted shall automatically
         terminate upon the earliest to occur of (i) the expiration or
         termination of this Lease, (ii) the termination of Tenant's right to
         possession of the Premises, (iii) any assignment or subletting by
         Tenant, or (iv) the failure of Tenant to timely or properly exercise
         the Renewal Option.





         IN WITNESS WHEREOF, this Second Lease Amendment is executed as of the
day and year set forth above.




LANDLORD:                 ORLEANS   ILLINOIS   VENTURE,   an  Illinois  Limited
                          Partnership,  by IJM Management Limited  Partnership,
                          an Illinois Limited Partnership



                          By:    _/s/ Irving J. Markih_____
                          Name:  _Irving J. Markih_________
                          Title:  President________________





TENANT:                  CDW COMPUTER CENTERS, INC., an Illinois corporation



                         By:    __/s/ Doug Eckrote_________






STATE OF ___IL______                 )
                                     )
COUNTY OF __Cook_____                )


                  I, _Chrystal L. Foss___, a Notary Public in and for said
County, in the State aforesaid, DO HEREBY CERTIFY that _Irving J. Markih____, as
_President_____ of IJM MANAGEMENT LIMITED PARTNERSHIP, the _agent____ of ORLEANS
ILLINOIS VENTURE, an Illinois limited partnership, who is personally known to me
to be the same person whose name is subscribed to the foregoing instrument as
such _President_____ of said Limited Partnership, appeared before me this day in
person and acknowledged that __he__ signed and delivered the said instrument as
_his__ own free and voluntary act and as the free and voluntary act of said
Limited Partnership, for the uses and purposes therein set forth.

                  GIVEN under my hand and notarial seal this __7th__ day of
__June____, 2001.
                        /s/ Chrystal L. Foss
                     --------------------------------------
                                  Notary Public

STATE OF ___IL_____                 )
                                    )
COUNTY OF _Cook_____                )


                  I, _Michael Tepper___________, a Notary Public in and for said
County, in the State aforesaid, DO HEREBY CERTIFY that _Doug Eckrote________, as
_SR VP of Purchasing_ of CDW COMPUTER CENTERS, INC., who is personally known to
me to be the same person whose name is subscribed to the foregoing instrument as
such __SR VP___ of said Corporation, appeared before me this day in person and
acknowledged that __he__ signed and delivered the said instrument as _his___ own
free and voluntary act and as the free and voluntary act of said Corporation,
for the uses and purposes therein set forth.

                  GIVEN under my hand and notarial seal this __6th____ day of
__June_____, 2001.

        /s/ Michael Tepper
- --------------------------------------
Notary Public