Shut down completely > Press and hold Power button for 20 seconds> Release it > Wait 10 seconds > Turn it back on
If that doesn’t work, do the deeper reset:
Shut down > Hold Power + Volume Up together for 15–20 seconds > Release.
Wait 10 seconds.
Download Drivers and Firmware:
Download drivers and firmware for Surface
Control Panel > Power Options > Choose what the power buttons do > Change settings currently unavailable > Uncheck Turn on fast startup > Save > Restart