try a two button reset. if that does not work, uninstall the drivers in device
manager but do NOT delete them and restart (that will reload the drivers)
here's the 2 button reset:
Step 1: Press and hold the power button on your Surface for 30 seconds and then
release it.
Step 2: Press and hold the volume-up button and the power button at the same
time for at least 15 seconds and then release both.
The screen may flash the Surface logo, but continue holding the buttons
down for at least 15 seconds.
Step 3: After you release the buttons, wait 10 seconds.
Step 4: Press and release the power button to turn your Surface back on. You
should see the Surface logo.