I have two PCs each containing an identical Maxtor SATA 120GB hard disk. I have been using both PCs successfully for 8 months. However, I now have a problem: PC#1 goes to a blue screen (with a 0x000007E error) after a few seconds of the Windows XP logo screen after booting up. I have tested the hard disk in PC#2 and it works fine. I have also removed the hard disk from PC#2 and tested it in PC#1 and this also works fine. I would prefer not to swap the drives permanently as PC#2 is used for work and PC#1 stores music and movies. I have tried to reinstall Windows but it does not even load from the disk. I am particularly baffled by this problem because as I have said, PC#1 works perfectly with the hard disk from PC#2. Could you help my situation?