PC CMOS Cleaner is a specialized software tool designed to address this exact problem. By using the PC CMOS Cleaner 2.0 USB boot verified version, you can create a bootable drive that operates outside of your installed operating system, allowing you to interact directly with the BIOS to recover or clear its password.

Now, move to the computer that is locked with the BIOS password.

While you can find pre-made ISO images, the safest and most verified method is to build your own. Here is a step-by-step guide to creating a verified, bootable USB CMOS cleaner.

This must be done on a functioning computer.

: If your system utilizes BitLocker or any hardware-level drive encryption, locate your recovery keys first. Clearing the CMOS can wipe the Trusted Platform Module (TPM) keys, locking you out of your encrypted data.

: Attempts to clear only the supervisor/user password while keeping other settings.

This guide uses version 2.0, which remains the most commonly referenced distribution for this specific utility, and assumes a standard Windows environment.

Old boards often have bulging capacitors that leak charge back into the CMOS. Jumper resets fail. The software-based "20 iteration" cleaner forces a hard reset that hardware cannot achieve.

Turn on the PC and immediately press the boot menu key (usually F12, F11, F8, or Esc, depending on the manufacturer). Select USB: Choose your USB flash drive from the list. Launch Cleaner: The PC CMOS Cleaner menu will appear. Phase 3: Cleaning the CMOS