Why this works: Some legacy PS/2 emulation in the Surface BIOS has a buffer overflow that skips the password check on specific firmware versions (v3.11.xxx and older).
Many websites claim to generate “Surface master passwords” based on serial number or lock code. These on Surface Pro 4 BIOS because Microsoft doesn’t use standard OEM backdoor hashes (unlike Dell or Lenovo). Scam risk is very high. surface pro 4 bios password reset high quality
Resetting a Surface Pro 4 BIOS Password For the Microsoft Surface Pro 4, a BIOS (UEFI) password is a high-level security feature. Unlike standard desktop PCs, you cannot reset it by simply removing a battery or moving a jumper. Official Microsoft Stance Why this works: Some legacy PS/2 emulation in