I extend my welcome as well bass_online,
You might also want to attempt to remove and reinstall the drivers as a custom install WITHOUT GeForce Experience. I have not had good luck with it on my GTX 750 Ti.
To do this, remove all NVidia software from Programs and Features, then reinstall with one of the driver sets that bcavnaugh recommended (I have found good success with those as well). Then when you do the reinstall, make sure you select Custom Install not Express Install and scroll down to uncheck GeForce Experience. Also it would be good to check the box for Preform Clean Install to help clean up some of the leftover files.