Microsoft has released the first RC (Release Candidate) build of Windows 7 Service Pack 1 to the general public. In order to install the service pack, you must have a final RTM version of Windows 7. Moreover, if you have already installed a previous build of the service pack, you will have to uninstall that first. Windows Server 2008 R2 SP1 Release Candidate has also been made available for download.
Windows 7 SP1 doesn’t include any major new features. It’s mostly a collection of previously released hotfixes and updates. However, the server edition introduces two new features – RemoteFx and Dynamic memory, which were discussed earlier. The final build is expected to be released in Q1, 2011.