No matter which crack I install, upon reboot the floppy spins for a few seconds longer than normal then the screen just flashes shades of black, as if changing the resolution endlessly. This happens with every single crack that places 'grldr' and windows is no longer bootable. I have to use the DVD to run command prompt and delete grldr. Any ideas of what on earth this is?! Win7 x64, no other OS installed.