Original post by: Yookin Tryta ,
Swipe down from the top with two fingers or try tapping twice quickly center screen. Do anything you can to get to accessibility options. Make sure accessibility switches all are off. This happened to me too, its a setting i somehow hit . Cant remember which, so turn it off. Also if you lose touch function and there is a thin green or yellow colored "frame" surrounding the window you see, it is definitely this problem!