thanks, the scan is running now. are you sure it must definately corrupt?
basically, this is the welcome screen now
it looks to me like just a different security setting where the account names aren't displayed?
EDIT - i forgot to say that's a printscreen from google, i'm not on ultimate
EDIT - sfc /scannow yields no results, everything's in order apparently
EDIT - FIXED YES YES YES YES YES
it was an option in the system registry
Log On with User Name and Password