Several of my users are experiencing an issue where when they attempt to sign into a machine, sometimes for the first time (much more than what it takes to create the new profile) it can take up to 30 minutes for them to sign in. Their login freezes at "Applying Personal Settings". The users range in permission from enterprise admin to basic domain user. There is no common connection I can see. Hardware, permissions, and operating systems range across the board.
As soon as I rename their profile (if they even had one on the machine anyway), they are able to sign in rather quickly.
Any ideas on what might be causing this?