What the hell is Vista CONSTANTLY using my hard drive for. All of a sudden, i can be doing nothing in particular, and it constantly uses my hard drive, when i try to do anythign else, it becomes choppy and slow and refuses to run other programs. WTF is going on? Its not my AV, and its not indexing service as i turned that off to check. It wont even shut down anymore, as it is constantly accessing the hard drive and wont let it shut down.