Create a new account and try it again.
PS. Yes that was their answer.
I have a PC running XP Pro which is a workstation in a 2003 Server domain. When logging in, either to the domain or to the local system, the system reboots after the password has been entered. I've tried restoring to an earlier point without any success. I can tell you that I am able to log in normally in safe mode. Has anyone ever experienced this behavior and what have you done to correct it?