First off: Grammar please. There's a period key and shift key on your keyboard for a reason

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Sounds like your disc could be scratched, or you may have bad RAM (2 possibilities that I'm throwing out there). Download Memtest86, burn the ISO to a blank CD with ImgBurn (another free program). Boot off of the disc, and run it for at least 5 hours (at the minimum).
Is the drive recognized in BIOS at all?