IT administrators use SEMM to manage UEFI settings remotely. If this applies to your device, follow these steps:
The Surface Pro 4 does not rely on a volatile CMOS battery to store its BIOS password. Unplugging the main battery for days will not clear the memory.
Locate the 8-pin EEPROM chip. It is typically a or Macronix chip (e.g., W25Q128FV). 3. Read the Original Dump
If your device still boots into Windows normally, but you need to enter the UEFI settings (for example, to enable booting from a USB drive), you can effectively "work around" the password without ever needing to enter it.
Once you successfully regain access to your Surface Pro 4, implement these best practices to avoid future headaches:
: Insert the USB drive into your Surface Pro 4. Press and hold the Volume Down button and then press the Power button. Release the Power button but keep holding the Volume Down button until the Surface logo appears.
Microsoft provides a built-in feature in the UEFI firmware settings to reset the BIOS password on Surface Pro 4. Here's how:
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.
Locking yourself out of your Microsoft Surface Pro 4 UEFI/BIOS can completely halt your workflow. Whether you bought a used device with an unknown password or simply forgot your credentials, gaining administrative access is crucial for changing boot orders or installing a new operating system.
The password is encrypted and stored directly inside a physical Unified Extensible Firmware Interface chip on the motherboard.
However, you can successfully regain control of your device. This comprehensive guide details the highest-quality, verified methods to resolve a locked Surface Pro 4 BIOS. Understanding the Surface Pro 4 UEFI Architecture