Have a Western Digital that stopped booting. It hangs at the Windows XP spash screen, with the scroll bar running beneath it. When trying to boot to safe mode, it hangs as it's loading .sys files from the drivers folder (last one listed is amdagp.sys). I can see it in the bios, and I've run a WD diagnostic tool and another one on it and they say it's fine. I'm guessing the MBR might need fixing. But the real problem is I put it in another system as a slave and it keeps that one from booting up, too. Same problem with getting to safe mode and a prompt, except that it hangs at agpcpq.sys. Any thoughts, on at least being able to access it from a prompt so I could try to repair it, or at least save the data?