ok, well that should help. Are you doing a complete fresh reinstall? or just a repair installation?
The complete fresh should fix the problem unless its hardware related, try running windows barebones for a while i.e. don't install all for your programs straight away, that way if its a software confilict it'll be easier to narrow down.
Are you running any other security software apart from mcafee?
Intel core I7 920
6GB OCZ platinum 1600
Samsung 1TB F1 Spinpoint
Samsung SM2443BW 24"