Microsoft have today delivered the first release candidate (RC) for Windows 7 and Windows Server 2008 R2. Service Pack 1 is slated for release in early 2011 but there is no confirmed date. The Service Pack can be downloaded here and the associated documentation can be downloaded here.
The document “Windows 7 and Windows Server 2008 R2 Service Pack 1 Release Candidate Notable Changes” has changed since the initial beta release but is now dated June instead of February 2010; the document “Windows Server 2008 R2 and Windows 7 Service Pack 1 Test Focus Guide” has moved to version 1.3 and is dated October 2010 and the final document “Hotfixes and Security Updates included in Windows 7 and Windows 2008 R2 Service Pack 1 Release Candidate” is dated October 2010 too.
The Service pack now consists of: 78 Non-Security GDR updates, 27 Security updates and 520 Hotfix updates.
The last Security update included in the Release Candidate is MS10-061
For a technical overview of Windows Server 2008 R2 SP1 RC release, click here.