When you install Windows 7 SP1 or Windows Server 2008 R2 SP1, it backs up all the files that it replaces. This is done so, if, should you choose to uninstall Service Pack 1 at any point in time, these ...

Using vLite to customize a Windows 7 installation to remove some system components. To fix this problem, follow the steps below to reinstall Windows 7, and then try to install Windows 7 SP1 RC again.