okay when i first got my computer it was incredibly fast. then something weird happened with defragment. so we reinstalled windows. and the problem was gone. but my computer is really really slow. like a lot slower then it should be. i have 1.8 ghz computer with P4. but things take an awful long to load. ie. applications, windows. does anyone know of a program or programs that can detect what is slowing down my comp or can increase my comp's speed? or if anyone knows anything else that would be helpful.