OK I've had problems with my dad's PC hanging in the past but I was able to track that to a simple setting change in the BIOS and solve it. But this time, after a complete new installation of Windows XP SP2, his PC has started to hang again. Only this time, it hangs and automatically restarts. I've attached the minidumps so you guys can read them and help me out. My dad needs this PC for his work, and he doesn't want to buy a new one. Thanks in advance for your help guys.