I have a user who I've manually added as a local admin on an XP machine with sp3. After a restart, the user loses local admin rights. The computer and user accounts are in the same OU's as everyone else. I've tried unjoining from the domain, renaming the computer, and joining back. I've looked at group policy and there are no restricted groups. Maybe there's something else there I'm not seeing? As far as I know, it's just this one user.