Dell laptops:
- Unplug everything from the laptop.
- Hold the power button down to turn off the laptop and keep holding the power button down for another 30 seconds after the laptop turns off.
- Turn the laptop back on.
- Once the laptop has booted up completely plug everything back in.
Microsoft Surfaces:
- Unplug everything from the Surface.
- Press and hold the volume up and power buttons for 20 seconds.
- Let go of the buttons and wait 10 seconds.
- Turn the Surface back on, waiting for it to boot up completely, and plug everything back in.