My friend's computer is a dell running Vista Home Premium and is pretty new as in a few months, his dads account works fine but at the logon screen if you click his name and try to log in on his account you get this message "The User Profile Service service failed the logon. User profile cannot be loaded" and then does nothing but give you the option to click OK and then it takes you back to the logon screen. I wasn't sure what was going on but I ended up just deleting his account and making a new one. This worked for about a week or two and now it's doing it again. Any thoughts as to what's going on?