Dennis Foote - Systems Engineer
Full system recovery of a systems operating system should be last option if you would like to to fix a broken copy of windows.
If you would like to keep your data and you happen to have the media your computer came with or just a windows disk lying around, I would suggest taking a stab at running windows recovery mode.
Start by using windows system recovery from your OS media disk. When booting from your windows disk you should see the option to repair your PC. Once in the command prompt, try to run a chkdsk /p or chkdsk /r. This may save you some time by just replacing bad windows files that get corrupt from time to time.