<P> There are seven editions: Foundation, Standard, Enterprise, Datacenter, Web, HPC Server and Itanium, as well as Windows Storage Server 2008 R2 . </P> <P> Microsoft introduced Windows Server 2008 R2 at the 2008 Professional Developers Conference as the server variant of Windows 7 . </P> <P> On January 7, 2009, a beta release of Windows Server 2008 R2 was made available to subscribers of Microsoft's TechNet and MSDN programs, as well as those participating in the Microsoft Connect program for Windows 7 . Two days later, the beta was released to the public via the Microsoft Download Center . </P> <P> On April 30, 2009, the release candidate was made available to subscribers of TechNet and MSDN . On May 5, 2009, the release candidate was made available to the general public via the Microsoft download center . </P>

Windows server 2008 r2 standard service pack 2 download