Windows Server 2008 build 6001.16606

Windows Server 2008 build 6001.16606 is a build of Windows Server 2008. The setup background has changed its appearance and the desktop background has a darker blue tint.

It is the earliest leaked build of said operating system that identifies itself as "Windows Server 2008", but however, in some places, such as branding, it still identifies itself as Longhorn Server.