Ok, well this gives me a LOT of information...and a way out for you

If you restart the computer (into Safe Mode) by pushing F8 before the windows logo comes up.
Log in with the Administrator password...
Goto Start -> My Computer -> Local Disk (C) -> Documents and Settings -> your username that is having the trouble -> select the NTUSER.DAT file, and delete it.
If you don't see this file, you will need to goto Tools -> Folder Options -> View -> Show hidden files and Show system files
Restart your computer again normally, and log in as per usual...this should be fine.
You might lose some settings (program defaults), but you shouldn't lose any data
