I hope I put this in the correct thread. Anyway I installed ccleaner, ccleaner enhancer, temp file cleaner and ultra defreag to an HP A1220n desktop running Windows XP.. After I ran all the applications the PC ran fine until I did a shut down. Now when I try to cut it on. All I can get is the screen that gives the options "start windows normally", "use last good configuration", boot in safe mode, etc... No matter which I choose it looks like windows is trying to boot but before it can it says, monitor shutting down or going to sleep, then recycles back to the safe mode, start normally, last known configuration etc, page.... I can't use system restore because it won't go to it..I did get a blue screen to come up once somehow..It said Windows has shut down to prebvent problems... Unmountable_Boot_Volume, then Stop:0x000000ED (ox82f2bd20, 0xc0000006, 0x 00000000, 0x00000000..The fan temp is at 48c....This is all the info I can give now.. Any help is greatly appreciated.