Resetting a Surface Pro 4 BIOS (UEFI) password is significantly more difficult than a standard Windows password reset because Microsoft does not provide a default password or a software-based reset tool Super User Official Solution: Microsoft Support Microsoft officially states that there is no way to reset the UEFI password
Warning: This will not work if the BIOS itself is password-protected from the start, but it can resolve some secondary security lockouts. 4. Advanced: Manual CMOS and BIOS Reflashing surface pro 4 bios password reset high quality
Why many DIY methods fail or are unsafe
Method 1: Resetting BIOS Password using UEFI Firmware Settings Resetting a Surface Pro 4 BIOS (UEFI) password