My brother just recently gave me a Gateway Laptop, and it runs really slow. I did a disk defragment on it and then I tried to do a disc clean up and when I do that it just restarts. He has so many files under the disc clean up when it tries to clean it up it just restarts! I need help, I really want to clean up this computer. I would just reload Windows Xp on it, but I don't got the disk to do it. Can anyone Help me out there?