When my first tablet self-destructed, I inadvertanly deleted the touch driver. The pen driver was not working, thus both inputs were gone. Try force-starting your tablet. 1)Press and hold the power button until the tablet turns off. 2)Wait...count to 20 slowly. 3)Restart normally, the drivers should reload upon force-restart. This is not good to do this very many times, but sometime you have to do this to get it going again. If you lost your pen, then the Auto-self destruct has engaged. Get ready to send it in.