Hey, Marty - That's great news! Unfortunately, if the video driver hadn't been the problem, there would have been some long diagnostic sessions in store for us, or else biting the bullet and executing the (almost) guaranteed-to-fix-all, but royal PITA solution of reinstalling the OS and everything else. At least that would have excluded some recent invisible change to your system (eg, virus, hardware failure, power glitch, etc.) being the culprit.
This is one reason why I, and most people who do a lot of this sort of thing, have their OS and all apps on one drive, all their data on other drives, and keep off-site rotating periodic images of their OS+apps drive of when it is working well. That way, it's not a big deal to revert the system back to a good state.
Again, glad to have pointed you in a helpful direction.
Anyway, now that you have PS working again, hang out, post some images, and chat.
Regards,
Tom