Before you start If your Game Bar widget is out of focus or disappears, press the Windows logo key +G to recall it. If you have questions or want to learn more about the widget, visit Start gu...
Then press and hold the power button for 20 seconds. If you see the logo screen appear after a few seconds, continue to hold for the full 20 seconds until you see the logo screen again. See Force a shut down and restart your Surface for more info....