My experience has been that if Windows in Safe Mode, Normal Mode, Last Known Good Configuration, etc. doesn't kick in within 15 minutes, it's not going to happen. Try again with some of the other options in the Windows menu. If nothing works, your only option, in my experience, is to run the Recovery, knowing that all of files, programs, pictures and music that were added after the initial installation will be lost. It really sucks. Hopefully you have a good and recent backup. When my wife's computer got hit with a nasty virus last year, I was glad that I had gotten her the online backup.