Boot to the UEFI and disable the wifi. Wait 20 seconds and re-enable it.
- Shut down your Surface.
- Press and hold the volume-up button on your Surface and at the same time, press and release the power button.
- When you see the Surface logo, release the volume-up button.
The UEFI menu will display within a few seconds.
What does device manager report after you do this after restarting?