|"It will be difficult to do system restore if you have a blank screen"|
It will be if you don't read the info provided in the link.
"Note: For best results, you should run System Restore from safe mode.
If you receive an error while restoring, then use it from safe mode and it should work fine. To get into Safe mode, you can reboot and use the F8 key right before Windows starts up.
If the F8 key doesn’t work for you, you can force the system to go into safe mode by following instructions from Larry in the comments.
If Your System Won’t Boot
If you can’t even get into windows, you can boot off the installation dvd, and choose the “Repair your computer” option on the lower left hand side. If you don’t have an installation/repair disc, you can make one with these instructions."