try it from the repair console, the OS on your HDD wont be active at the repair console so you ought to be able to do pretty much anything to it without it interfering.
Edit: oh and I'd check your drive filesystem integrity and your system files (run sfc /scanonce then reboot) as well.
Intel core I7 920
6GB OCZ platinum 1600
Samsung 1TB F1 Spinpoint
Samsung SM2443BW 24"