Well tryed the 344.11 driver and that did the job
Now that it's fixed, and if the rest of your pc is working fine, you should create a system image:
(Start -> Control Panel -> System and Security -> Backup and Restore -> Create a system image)
If shit hits the fan one day because of auto-updates or your nephew moved some of your Windows files around or whatever, you can always go back to this current state that your pc is in, just don't get a virus. Also, speaking of auto-updates, if you haven't already done so, I suggest to turn them off where possible (except your antivirus), and manually update programs/games/drivers as needed. That way, if something feels off right after an update, you'll know which update caused it.