How to fix a corrupted user profile in Windows 7:
"Your user profile is a collection of settings that make the computer look and work the way you want it to. It contains your settings for desktop backgrounds, screen savers, pointer preferences, sound settings, and other features. User profiles ensure that your personal preferences are used whenever you log on to Windows. If you tried to log on to Windows and received an error message telling you that your user profile might be corrupted, you can try to repair it. You'll need to create a new profile, and then copy the files from the existing profile to the new one."
Follow these steps:
First create a new user profile, by creating a new user account.
Here's how fix a corrupted user profile in Windows Vista.