Jack gets the dreaded blue screen of death when he boots into Windows, and he can't even boot into safe mode. Leo says that tends to imply a serious error. It's either bad hardware or bad drivers. If he can't boot into safe mode, then that points to a hardware problem. It could be bad memory or a flakey hard drive. It could also be that the hard drive may have a bad bit in just the right spot that's causing the crash. Leo recommends running the repair utility from his Windows install disc. If that doesn't repair it, he may need a new hard drive.