Moses has been getting a blue screen of death (BSOD). What is that? Leo says that a BSOD is a crash that has forced Windows to not work anymore. Moses has reinstalled Windows, but it still happens. Leo says that points to a hardware issue. A hardware flaw like a flakey power supply, video card or hard drive. It also could be a driver, but with a spontaneous reboot, it's probably the power supply. Fortunately, these are easy to replace. He can even do it himself. Moses should make sure he matches the existing power supply in wattage.