Have you rolled back the driver in Device Manager.
Another option is to select Update driver and then select to Browse my computer and on the next screen select Let me pick from a list of available drivers. See if other listed drivers reset the audio, if there are other drivers.
A reset may be your only option in the end but yo should have your personal files backed up to and external device. There will be an option to keep personal files but all non standard programs/apps will be removed.