Surface Pro 4 Bios Password Reset High Quality May 2026

Warning: UEFI (BIOS) passwords on Surface devices are a security feature. Microsoft’s official position: if you set a UEFI password and forget it, it cannot be recovered by anyone using normal consumer support — only the party that set the password (or an IT administrator with the device’s management keys) can remove it. The methods below cover your realistic options: official recovery paths, safe workarounds, and the advanced enterprise route used by IT teams. Do not attempt anything that would void warranties, break laws, or violate someone else’s ownership.

For high-quality, permanent results: Buy the CH341A programmer and learn to use it. Watch three YouTube tutorials on "Surface Pro 4 SPI flash" before touching the motherboard.

Step 1: Disassembly

Step 2: Connect the Programmer

Step 3: Read and Backup (CRITICAL)

Step 4: Extract the Password Hash

Step 5: Write a Clean Dump

Step 6: Reassemble

Note for beginners: This method has a 99% success rate but a 50% brick rate if you mishandle the clip. Consider a repair shop ($50-$100). surface pro 4 bios password reset high quality

For a guaranteed, high-quality reset, you must reprogram the BIOS chip directly. This requires moderate soldering skill or a willingness to take the device to a repair shop.

The Surface Pro 4, like most business-class devices, has a BIOS (UEFI) lock that can be set to prevent unauthorized booting or OS changes. If you forget the password—or buy a used device with an unknown password—resetting it is not trivial and cannot be done via a simple CMOS battery removal (the SP4 has no user-accessible CMOS battery).