Today we are releasing the Release Candidate (RC) of Windows 7 and Windows Server 2008 R2 Service Pack 1 (SP1) to the public.  This RC signals the last public beta build to be released prior to the Release to Manufacturing (RTM) final release.  As previously announced, the only new features added to the SP1 are the Windows Server 2008 R2-related virtualization technologies, Dynamic Memory
– please see the Windows Server Division Weblog for more details
. These features will help customers who choose to deploy Windows through Virtual Desktop Infrastructure (VDI) by enabling a more scalable and rich user experience.
While Windows 7 SP1 will enable PCs to take advantage of these server-based features to provide a more scalable and richer VDI experience for end users, there are no additional new features specific to Windows 7.
You can download the RC of Windows 7 and Windows Server 2008 R2 by clicking here