My brothers computer won't stay on at all. I'm a DSL troubleshoot Tech and I don't know what the deal is. Turn it on and while windows is trying to boot up, pc shut down again. Tried to reformat his OS (windows XP on an E-Machine), but with same results. Any ideas on what might be causing this?? Is there a virus out there that does this type of thing, and if so what can I do to fix it??? Thanks and Merry Christmas