I've recently encountered a problem where I was forced to reformat because my computer did an endless loop of BSODs/Reboots and I said "Must be the hard drive" so I Formatted it... Attempts to reinstall my OS FAILED With repeated blue-screens all saying the same thing. "IRQL_Not_Less_Or_Equal" and all the solutions I found online REQUIRE the OS to be installed. My OS Is Vista with 4 gigs of ram, a GTS 250 Graphics card, Quad-core processor... think that's it. Any attempts to fix and find answers have failed. I think the motherboard's dying on me.