I noticed today that "Disk Cleanup" will not function of my PC. When I start it up, the little "Disk Cleanup" box appears in the center of my screen and has three bars "Scanning: Compress old files" and.....that's it. It stays like that for the duration. Finally, after 2 hours earlier today I cancelled the "Disk Clenup" but I don't think it is working and nothing is happening. Does anyone know what possibly might be going on?