Co-worker of mine came to me just now with an interesting issue.

Vista machines are showing a message that basically states --
User can not log in to windows due to a corrupt account.

(Obviously not the exact message.)

However, the account operates properly in safe mode.

--

My request is threefold.

#1 - Prompt reply if possible.
#2 - What could cause this?
#3 - Is there a way to fix this *with out* doing a reinstall of the OS?