Service Pack 1 for Windows 7 and Server 2008 R2 is RTM

SP1 is RTM and will be available for download as follows;

• TechNet/MSDN/VL subscribers - Feb 16, 2011
• General availability (Download Center/Windows Update) - Feb 22, 2011

It would appear that an uninstall of SP1 Beta or RC is still required before installing RTM - there have been reports of users who are not able to remove SP1 RC due to the uninstall files being placed in a Temp folder during installation, any disk cleanup tasks post installation which might have removed these files will prevent uninstallation. I guess the only safe options would be System Restore back to a pre-RC restore point, or a complete rebuild. Hopefully you didn't deploy the RC to any production servers, the RC will expire on Nov 30, 2011.

Service Pack 1 Release Candidate released for Windows 7 / Server 2008 R2!

SP1 Release Candidate (RC) has just been released for Windows 7 and Server 2008 R2, here's a link to the MS download page: http://technet.microsoft.com/en-us/evalcenter/ff183870.aspx

If you installed SP1 Beta then you will need to first uninstall it before installing RC - and believe me, it's going to take a while. If you removed the SP1 Beta uninstall files to free up disk space, then sorry for you - upgrading to RC is not possible. You will be required to completely re-install Windows 7 or Server 2008 R2, or restore a complete System Image Backup, created prior to installing the SP1 Beta, before you can install the RC.