i just purchased a p43de motherboard....as a quick replacement to a motherboard that is being rma'ed....my problem is that i cant load window 7 from existing hard drive it ...to be clear i am trying to do a fresh install of windows and it says ...setup was unable to create a system partition or use an existing one...what can i do to correct this?...i have tried to or refoirmat the drive but it says i cant...and asks dor drivers which i try to supply from the asrock cd but they do nothing....HELP!!