We've got a mup.sys error on one of our computers at work. When starting normally, we get to the welcome, select profile screen than it simply blue screens, with the stop: 0x0000007E error code. We can get to safe mode with no problem, and mup.sys is the last loaded driver, but it does continue on into safe mode. We tried a registry cleaner program, but that didn't fix it.
There have been no added hard drives or anything to this computer.
The computer is a Dell Precision PWS390, with a 3 GHz pentium 4 CPU, 2 GB of RAM, and it's running XP Pro,Ver. 2002, Service pack 3.
I don't know alot when it comes to hardware on these things, so you may have to bear with me.