RUU Tools no longer work..

Hey guys.. I am no longer able to use flash any rom from my Vista 64 SP1 machine. I have flashed many many times successfully on this same setup before and now the rapitool stops working and crashes and stops the update utility before it can even start. I have reinstalled windows 3 times and now it never works. Has anyone seen this before......


Please Help. It worked and then it stopped out of nowhere....