http://blogs.technet.com/tliles/archive/2007/09/25/public-release-of-windows-server-virtualization.aspxWindows Server 2008 RC0 includes the first public look at Windows Server Virtulization (code name Viridian ). You can start the download process here http://www.microsoft.com/windowsserver2008/audsel.mspxen-USCommunityServer 2.1 SP1 (Build: 61025.2)