Windows Server 2003 R2 Release Candidate 1 (RC1) is availablehttp://blogs.msdn.com/sluper/archive/2005/10/25/484645.aspxWindows Server 2003 R2 release candidate software is available to download for evaluation in both x64 and x86 versions. Windows Server 2003 R2 RC1 software cannot be installed on anything other than software versions of Windows Server 2003 with Serviceen-USCommunityServer 2.1 SP1 (Build: 61025.2)