I have a Windows XP Home hard drive that will not boot. After the opening screen the system just re-boots. This will even happen in safe mode. The motherboard and all other components, including the power supply, work fine. I did find out that somebody played some games online shortly before this happened, but after slaving the drive and scanning it for viruses I cannot find any. My suspicion is that the hard drive itself is at fault, but I wonder if there is any other possibility. I would format the hard drive, but I was told by the user that it has sensitive information that neither him or me know where all of it is. Any ideas?