Service Pack Uninstalls

I did not find this out myself, but I thought I would post it as a reminder. If you have a Service Pack install that blue screens your PC, it can be repaired! Pop in a windows CD, and enter recovery mode by pressing "R". At that time, you select which Windows installation you want to repair. Select your installation, then enter in the Windows password. At this point, type "cd\$ntservicepackuninstall\spuninst" and hit enter. Then type in "batch spuninst.txt", wait for it to finish, and then reboot the machine. You SHOULD at this point have a functioning machine.