Exhibit 10.28

AMENDMENT NO. 3 TO REVOLVING CREDIT AGREEMENT

This Amendment No. 3 to Revolving Credit Agreement (“Amendment”) dated as of March 28, 2011, by and among the financial institutions signatory hereto (individually a “Lender,” and any and all such financial institutions collectively the “Lenders”), Comerica Bank, as Administrative Agent for the Lenders (in such capacity, the “Agent”), Arranger, Syndication Agent and Documentation Agent, and Software Brokers of America, Inc. (“Borrower”).

RECITALS

A. Borrower, Agent and Lenders entered into that certain Revolving Credit Agreement dated as of December 22, 2009, as previously amended (“Agreement”).

B. The parties desire to amend the Agreement as set forth below.

NOW, THEREFORE, the parties agree that the Agreement is amended as follows:

1. On the Third Amendment Effective Date, the Revolving Credit Aggregate Commitment shall be reduced by $5,000,000 to Twenty Five Million Dollars ($25,000,000) in accordance with the terms and conditions of Section 2.11 of the Agreement. On the Third Amendment Effective Date, (i) Borrower shall pay to Agent for distribution to the Comerica Bank, as the sole Revolving Credit Lender the Revolving Credit Facility Fee, if any, accrued and unpaid to the date of such reduction; and (ii) Borrower shall prepay in accordance with the terms of the Agreement the amount, if any, by which the aggregate unpaid principal amount of Revolving Credit Advances and Swing Line Advances (including, without duplication, any deemed Advances made under Section 3.6 of the Agreement) outstanding under the Agreement, plus the Letter of Credit Obligations, exceeds $25,000,000, together with interest thereon to Third Amendment Effective Date.

2. On the Third Amendment Effective Date. the following definitions are added to Section 1.1 of the Agreement:

“‘Affiliate Guarantor’ shall mean Intcomex Latin America Finance Corp, an entity organized under the laws of the Cayman Islands.”

“‘Affiliate Guaranty” shall mean the guaranty agreement executed and delivered by the Affiliate Guarantor after the date hereof in accordance with Section 7.18 of this Agreement, guarantying payment of the Indebtedness, in form and substance satisfactory to Agent and its counsel, including, without limitation, its Cayman Island counsel, which shall include the covenants set forth in Section 8.16 of this Agreement, as such guaranty agreement may be amended, restated or otherwise modified from time to time.”

“‘Affiliate Security Agreement” shall mean a security or pledge agreement executed and delivered by the Affiliate Guarantor after the date hereof in accordance with Section 7.18 of this Agreement, granting Agent a lien on all of the personal property of the Affiliate Guarantor, in form and substance satisfactory to Agent and its counsel, including, without limitation, its Cayman Island counsel, as such security or pledge agreement may be amended, restated or otherwise modified from time to time.”

3. On the Third Amendment Effective Date, the following definitions set forth in Section 1.1 of the Agreement shall be amended to read as follows:

“‘Applicable Measuring Period’ shall mean (a) as used in the definition of “Consolidated Fixed Charge Coverage Ratio”, (i) through and including the fiscal quarter ending December 31, 2011, the period of time commencing on January 1, 2011 through and including the last day of the applicable fiscal quarter, and (ii) thereafter, the period of four consecutive fiscal quarters ending on the last day of the applicable fiscal quarter, and (b) for purposes of calculating the minimum Consolidated Net Income under Section 7.9(c), (i) through and including the fiscal quarter ending December 31, 2011, the period of time commencing on January 1, 2011 through and including the last day of the applicable fiscal quarter, and (ii) thereafter, the period of four consecutive fiscal quarters ending on the last day of the applicable fiscal quarter.”

“‘Collateral Documents” shall mean the Security Agreement, the Trademark Security Agreement, the Account Control Agreements, the Collateral Access Agreements, the Affiliate Security Agreement, and all other security documents (and any joinders thereto) executed by Borrower, any Subsidiary Guarantor or the Affiliate Guarantor in favor of the Agent on or after the Effective Date, in connection with any of the foregoing collateral documents, in each case, as such collateral documents may be amended or otherwise modified from time to time.

“‘Consolidated Tangible Net Worth’ shall mean, as of any date of determination, (i) the Consolidated total assets of Borrower, Borrower’s Subsidiaries and the Affiliate Guarantor at such date (excluding all amounts owing to Borrower, any of its Subsidiaries or the Affiliate Guarantor by officers, directors, shareholders and other Affiliates (other than Included Affiliate Trade Receivables, which shall be included for purposes of calculating such assets) and all patents, patent rights, trademarks, trade names, franchises, copyrights, licenses, goodwill and all other intangible assets of Borrower, Borrower’s Subsidiaries and the Affiliate Guarantor at such date, after all appropriate deductions in accordance with GAAP (including, without limitation, reserves for doubtful receivables, obsolescence, depreciation and amortization)) less (ii) the Consolidated total liabilities of Borrower, Borrower’s Subsidiaries and the Affiliate Guarantor at such date, all as determined in accordance with GAAP.”

“‘Guarantor(s)’ shall mean, collectively, each Subsidiary Guarantor, Intcomex and the Affiliate Guarantor.”

“Guaranty’ shall mean, collectively, the Intcomex Guaranty, the Subsidiary Guaranty, and the Affiliate Guaranty, in each case as amended, restated or otherwise modified from time to time.”

“‘Revolving Credit Aggregate Commitment’ shall mean Twenty Five Million Dollars ($25,000,000), subject to reduction or termination under Section 2.11 or 9.2 hereof.”

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4. On the Third Amendment Effective Date, Section 7.9(a) of the Agreement is amended to read as follows:

“‘(a) Maintain as of the end of each fiscal quarter of Borrower, commencing with the fiscal quarter ending March 31, 2011, a Consolidated Total Leverage Ratio of not greater than the ratio set forth below opposite the applicable fiscal quarter:

5. On the Third Amendment Effective Date, Section 7.9(c) of the Agreement is amended to read as follows:

“(c) Maintain as of the end of each fiscal quarter of Intcomex, commencing with the fiscal quarter ending March 31, 2011, on a year-to-date basis through December 31, 2011, and on a rolling four-quarter basis thereafter, Consolidated Net Income for Intcomex and its Subsidiaries for the Applicable Measuring Period of not less than the amount set forth below opposite the applicable fiscal quarter:

6. On the Third Amendment Effective Date, Section 7.18 is added to the Agreement to read as follows:

“7.18 Affiliate Guaranty. On or before May 31, 2011, (a) furnish or cause to be furnished to Agent (i) the Affiliate Guaranty duly executed by the Affiliate Guarantor, (ii) the Affiliate Security Agreement duly executed by the Affiliate Guarantor, and (iii) evidence satisfactory to Agent that the Affiliate Guaranty and Affiliate Security Agreement have been duly authorized, executed and delivered by all the Affiliate Guarantor, and (b) cause the Affiliate Guarantor to take such additional actions as may be necessary to ensure a valid first priority perfected Lien over such assets of the Affiliate Guarantor described in the Affiliate Security Agreement, subject only to the Liens permitted pursuant to Section 8.2 of this Agreement.”

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7. On the Third Amendment Effective Date, Section 8.16 is added to the Agreement to read as follows:

“8.16 Restrictions on Affiliate Guarantor.

8. On the Third Amendment Effective Date, Subsections (b), (d), (e), (f), (g), (h) and (i) of Section 9.1 of the Agreement are amended to read as follows:

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9. On the Third Amendment Effective Date, Schedule 8.16 is added to the Agreement to read in the form of Schedule 8.16 annexed hereto.

10. Each of the undersigned Lenders hereby acknowledges and agrees that, as of the Third Amendment Effective Date, after giving effect to the $5,000,000 reduction in the Revolving Credit Aggregate Commitment, the Percentages and allocations of each Lender under the Revolving Credit shall be as set forth in the attached revised Schedule 1.1.

11. This Third Amendment shall become effective (according to the terms hereof) on the date (the “Third Amendment Effective Date”) that the following conditions have been fully satisfied by Borrower:

12. Borrower hereby represents and warrants that, after giving effect to the amendments to the Agreement contained herein and any contemporaneous waiver of Events of

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Default by Bank, (a) the execution and delivery of this Third Amendment are Borrower’s corporate powers, have been duly authorized, are not in contravention of law or the terms of its organizational documents, and except as have been previously obtained do not require the consent or approval, material to the amendments contemplated in this Third Amendment, of any governmental body, agency or authority, and this Third Amendment and the Agreement (as amended herein) will constitute the valid and binding obligations of Borrower, enforceable in accordance with its terms, except as enforcement thereof may be limited by applicable bankruptcy, reorganization, insolvency, moratorium or similar laws affecting the enforcement of creditors’ rights generally and by general principles of equity (whether enforcement is sought in a proceeding in equity or at law), (b) the representations and warranties set forth in Sections 6.1 through 6.25 inclusive, of the Agreement are true and correct in all material respects on and as of the date hereof (other than any representation or warranty that expressly speaks only as of a certain date), and (c) as of the Third Amendment Effective Date, no Default or Event of Default shall have occurred and be continuing.

13. Borrower and Lenders each hereby ratify and confirm their respective obligations under the Agreement, as amended by this Third Amendment and agree that the Agreement hereby remains in full force and effect after giving effect to this Third Amendment and that, upon such effectiveness, all references in such Loan Documents to the “Credit Agreement” shall be references to the Agreement as amended by this Third Amendment.

14. Except as specifically set forth above, this Third Amendment shall not be deemed to amend or alter in any respect the terms and conditions of the Agreement or any of the Notes issued thereunder, or to constitute a waiver by the Lenders or Agent of any right or remedy under or a consent to any transaction not meeting the terms and conditions of the Agreement, any of the Notes issued thereunder or any of the other Loan Documents.

15. Unless otherwise defined to the contrary herein, all capitalized terms used in this Third Amendment shall have the meaning set forth in the Agreement.

16. This Third Amendment may be executed in counterpart in accordance with Section 13.9 of the Agreement.

17. This Third Amendment shall be construed in accordance with and governed by the laws of the State of Michigan, without giving effect to principles of conflict of laws.

18. As a condition of the above amendments, Borrower waives, discharges, and forever releases Agent, Lenders and their respective employees, officers, directors, attorneys, stockholders and successors and assigns, from and of any and all claims, causes of action, allegations or assertions that Borrower has or may have had at any time up through, and including, the date of this Third Amendment, against any or all of the foregoing, regardless of whether any such claims, causes of action, allegations or assertions are known to Borrower or whether any such claims, causes of action, allegations or assertions arose as a result of Agent’s or such Lender’s actions or omissions in connection with the Agreement, including any amendments, or modifications thereto, or otherwise.

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19. This Amendment may be signed in any number of counterparts, each of which when so executed and delivered shall be deemed an original, but all such counterparts together shall constitute but one and the same instrument.

20. Capitalized terms used but not otherwise defined in this Amendment shall have the meanings given such terms in the Agreement.

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WITNESS the due execution hereof as of the day and year first above written.

[continued on next page]

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Acknowledged by the undersigned Guarantors:

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Schedule 1.1

Percentages and Allocations

Revolving Credit Facility

SCHEDULE 8.16

EXISTING DEBT OF AFFILIATE GUARANTOR

March 28, 2011

Software Brokers of America, Inc.

9835 NW 14th Street

Miami, Florida 33172

Gentlemen:

Borrower has informed Agent and Comerica Bank, the sole Lender under the Agreement, that it failed to comply with the provisions of Section 7.9(a) of the Agreement as of December 31, 2010, failed to comply with the provisions of Section 7.9(b) of the Agreement as of December 31, 2010 and failed to comply with the provisions of Section 7.9(c) of the Agreement as of December 31, 2010 (“12/31/10 Covenant Violations”) giving rise to Events of Default under Section 9.1(c) of the Agreement. Comerica Bank, being the sole Lender under the Agreement, waives the any Events of Default that exist under the Agreement as a result of the 12/31/10 Covenant Violations.

In connection with its recent consideration of the Borrower’s request for a waiver of the 12/31/10 Covenant Violations, it has come to Comerica Bank’s attention that Borrower may have failed to comply with the provisions of Section 7.9(b) of the Agreement as of June 30, 2010 (“6/30/10 Potential Covenant Violation”). The 6/30/10 Potential Covenant Violation may be as a result of an inadvertent mis-interpretation or mis-calculation of the Consolidated Fixed Charge Coverage Ratio by Borrower and Comerica Bank. To the extent that the 6/30/10 Potential Covenant Violation may give rise to an Event of Default under the Agreement, Comerica Bank, waives any Events of Default that may exist under the Agreement as a result of the 6/30/10 Potential Covenant Violation.

The above waivers shall not be deemed to amend or alter in any respect the terms and conditions of the Agreement or any of the other Loan Documents, or to constitute a waiver or release by any of the Lenders of any right, remedy or Event of Default under the Agreement or any of the other Loan Documents, except to the extent expressly set forth above, Furthermore, the above waivers shall not affect in any manner whatsoever any rights or remedies of any of the Lenders with respect to any other non-compliance by the Borrower with the Agreement or the other Loan Documents whether in the nature of an Event of Default or otherwise, and whether now in existence or subsequently arising.

Except as specifically defined to the contrary herein, capitalized terms used in this letter shall have the meanings given them in the Agreement.

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