AMENDMENT 4 Effective Date: July 25, 2003

Exhibit 10.27

AMENDMENT 4

Effective Date: July 25, 2003

This Amendment 4 becomes part of the PRODUCT LICENSE AND DISTRIBUTION (the “Agreement”), dated December 10, 2001, between NSI and Dell Computer Corporation (“Dell”). The term of this Amendment 4 is six (6) months from the effective date of this Amendment 4.

§       Whereas, NSI and Dell wish to modify certain provisions regarding NSI Products, the Agreement shall be modified as follows:

       The following should be added to Exhibit A — Licensed Software:

§ Double-Take® for Windows

Each participating Dell Segment will be able to sublicense and distribute one (1) license of Double-Take® for Windows with each Dell CX200 that the participating Dell Segment ships. Dell shall pay NSI * for each Double-Take® for Windows license sublicensed and distributed under this Amendment #4 Such license can only be utilized as a target for replication on a single NAS or Server that is attached to a CX200.

Network Specialists Inc.						Dell Computer Corporation
Date: 11/13/03						Date: 12/2/03
Signature:		/s/ Xxxxx Xxxxxx				Signature:	/s/ Xxxx Xxxxxxxx
Print Name: Xxxxx Xxxxxx						Print Name: Xxxx Xxxxxxxx
Title: COO						Title: Director S&P Marketing
Fax Number: (000) 000 0000						Fax Number:

* Denotes confidential information that has been omitted from the exhibit and filed separately, accompanied by a confidential treatment request, with the Securities and Exchange Commission pursuant to Rule 406 of the Securities Act of 1933.

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