I tried to run the Disk Cleanup accessory to free up some HD space; and then started having a few odd things happening with my computer. It would crash when I ran the accessory, and it gives me this error code: ***STOP: 0x0000007B (0xF78E4524, 0xC0000034, 0x00000000, 0x00000000) I also now get warning notices from McAfee Security Center that there is a PUP or PRC on my computer. Neither sounds like a good thing. I'd like to try to reformat the drive; though I'm not really sure how to do that. I tried booting with the OS CD (XP Professional Media Center); but it crashes with the same error code as above when it gets to the "starting windows" stage. Any tips?