I have a Surface Pro 4 in which I have never set a UEFI password, but today when I tried to enter UEFI it is promoting me to enter a password which I have never set. My Surface Pro (5) has been reformated and UEFI locked by someone (it was stolen but I found the culprit). Bootloader for macOS, Windows and Linux in UEFI and in legacy mode. How to Configure Surface Pro UEFI/BIOS Settings. With UEFI boot mode, your computer can initialize the hardware components and boot the OS stored on the hard disk. AWS Engineer Puts Windows 10 on Arm on Apple Mac M1 - and It Thrashes Surface Pro X Slashdot Amazon’s cloudy Macs cost $25.
I verified with Microsoft Customer Services that it is not stolen using the serial number. With the computer off hold down the volume up button. Plug bootable CD or USB drive into locked Windows 8 UEFI/GPT PC. Keep holding the volume up button until the surface logo disappears. And then your Surface Pro 3 will boot from the USB recovery drive after a moment. I bought Surface Pro as spare/parts, no passwords available. On the next screen, you can just press Enter to start the password reset process.
Instructions to access the UEFI menu: Turn off the computer.