Boot into UEFI Mode on a Surface device
There are two methods to boot into UEFI Mode on a Microsoft Surface device. They are as follows:
1] Using the hardware key combinations
Make sure that your Surface device is completely shut down. Wait for 10 seconds or more. After that, press the Power button + Volume Up (Volume +) button together for a few seconds. Release the Power button as soon as the boot logo shows up but keep holding the Volume Up or Volume + button. You can now release the Volume Up or Volume + button as soon as you land on the UEFI Firmware Settings page.
2] Use the Windows 10 Settings app
Open the Windows 10 Settings App and navigate to the following path: Under the section of Advanced Options, select Restart now.
When it boots in the Advanced Options screen, select the options in the given order: The device will boot into UEFI Firmware settings page on your Microsoft Surface device. That’s it!
