As promised earlier this month, Microsoft has released Service Pack 1 RTM for Windows 7 and Windows Server 2008 R2, and is now available to download from the official download center. The Service Pack 1 RTM was first released to Microsoft TechNet and MSDN subscribers just a week ago.
The Service Pack for Windows 7 doesn’t bring major new features to the fastest selling Windows operating system in history. And, if you have installed SP1 Release Candidate (RC) build, you need to uninstall it before installing the RTM.
You might also want to slipstream Windows 7 Service Pack 1 into installation DVD or ISO.