Windows Server 2008 R2

Windows Server 2008 R2 is the server counterpart of Windows 7. It replaces Windows Server 2008 and was replaced by Windows Server 2012. It reached RTM on 22 July 2009 and drops support for the x86 architecture. It was also the last version of Windows Server to ship with the IA-64 architecture and that received a Service Pack from Microsoft.

This is the last version of Windows Server to support for processors without PAE, SSE2 and NX.