if you can load off the CD, and it will start the windows install, you can press F2 togo ASR (Automatic System Restore) but you'd have to have done a back up that involved a 3.5" disc
If that doesn't work, you can always continue, and then attempt to "Repair" your windows with the "R" button in the installation.
If that doesn't work... total reinstall.
2007 GMC Sierra RCSB - It breathes better now and looks better than stock.
2008 Honda 700XX - Doesn't need any mods.