I have gone through some of the solutions listed to try to get my scan disc and defragmenter to work. (They used to work on their own.) Now they constantly restart. As suggested I have tried to restart the computer, push con/alt/delete to turn off everything that may be writing to the disc. Only once did anything come up: P2p networking, Rundll32, Admilliserv, Rnaapp, and Admillikeep. (By the way, what are these things anyway?) When I tried to close one of them it turned off the whole computer. When I started over at con/alt/delete they didn't come up again. (I tried this several times.) I also tried to clean the cache file * .temp files. I think this helped a little, as scan disc and defrag started to run a little longer before restarting, but still won't complete the task. Another suggestion was to disable the screen-saver, but I don't know how. Another answer said to start in "safe mode". Well, I'm clueless there, too. In summary, can you help a computer-clueless person, step-by-step, get my scan disc and defragmenter to complete their tasks? P.S. What made them start to act up in the first place?