I too am getting the dreaded mup.sys problem. So I tried doing a repair from boot <XP HOME by the way> It loads all the setup files then goes to "searching for previous installations" it just stops. If I go into recovery console, it asks me which installation do I want to log onto. There is only 1 C:/windows and it also freezes right there. It freezes before even asking for admin password. So it sees that there's an install, but seems to freeze in a pretty similar way for both. Any suggestions ??