I downloaded a program called power defrag and was running it. It was in the middle of the defrag of my second, oldass 20 gig drive when i decided that it was taking too damn log and i closed it. However, the next time i restart my computer, I hear something shut off as it starts up, and windows no longer detects that that drive exists and when i try to format one it wont let me. What do I do? Is this beyond repair?