It appears that the NSA help Microsoft with the development of Windows 7.

Computerworld – The National Security Agency (NSA) worked with Microsoft on the development of Windows 7, an agency official acknowledged yesterday during testimony before Congress.

“Working in partnership with Microsoft and elements of the Department of Defense, NSA leveraged our unique expertise and operational knowledge of system threats and vulnerabilities to enhance Microsoft’s operating system security guide without constraining the user to perform their everyday tasks, whether those tasks are being performed in the public or private sector,” Richard Schaeffer, the NSA’s information assurance director, told the Senate’s Subcommittee on Terrorism and Homeland Security yesterday as part of a prepared statement.

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