Forgetting your Surface Pro 4 UEFI (BIOS) password can feel like hitting a brick wall. Unlike standard Windows login passwords, which are relatively easy to reset, Microsoft's UEFI security is designed to be rigorous. Microsoft Support officially states that they cannot retrieve or reset these passwords for you. If you are stuck, 1. Distinguishing BIOS from Windows Passwords First, ensure you are actually locked out of the BIOS.
The Surface Pro 4 was designed with enterprise security in mind. Microsoft deliberately made the BIOS password difficult to reset to prevent theft. (there isn't one), and no backdoor password exists. surface pro 4 bios password reset high quality
Technicians use a hardware programmer (like the CH341A) to read the chip's data, strip the password section from the hex code, and re-write the "clean" firmware back to the chip. Forgetting your Surface Pro 4 UEFI (BIOS) password
Once you reset the BIOS password, do not make the same mistake twice. If you are stuck, 1
Rui Carmo