|Are you booting to the cd and then trying that?|
I think I remember there is a way to do that. You have to change to the hard drive and run sfc.exe from there. The cd would be better off if you had slipstreamed to the latest sp level.
I'd use a barts cd or linux live cd to try to fix a few files or just do a "repair" and reload apps.
Playing to the angels
Les Paul (1915-2009)