During the development of Windows Server 2003 we spent a great deal of time reducing the default installation attack surface. The changes we made may have an impact on software you develop for the product. A new article, "Development Impacts of Security Changes in Windows Server 2003" outlines some of the changes. http://msdn.microsoft.com/library/en-us/dncode/html/secure06122003.asp Cheers, Michael Writing Secure Code 2nd Edition http://www.microsoft.com/mspress/books/5957.asp