For older ProBook models like the 450 G2, HP support previously provided a customized file to reset the BIOS.

: Write down the 8-digit code displayed (ignore any prefix letters like 'A').

: A BIOS programmer (like the TL866II Plus ) and an SOP8 adapter.

: Restart your ProBook, press F10 to enter BIOS, and enter the generated password. Method 2: Contacting HP for an SMC.bin File

On many business-class laptops like the ProBook, removing the CMOS battery often resets the system clock but , as it is stored in non-volatile memory. However, it may reset basic hardware settings. Safety First : Power off and unplug the laptop.

: This involves desoldering the BIOS chip, reading the data with a programmer, using a utility like RC Unlocker to clear the password field, and reflashing the chip. This is high-risk and should only be performed by professionals. Essential Post-Reset Steps Once you regain access, ensure your system remains stable:

If your ProBook generates a recovery code after several failed attempts, you might be able to find a backdoor password.

: Type the code exactly as shown into the website to generate a potential master password.

HP ProBook 450 G2 BIOS Password Reset Guide Locking yourself out of your BIOS can be a major roadblock, especially when you need to change boot orders or hardware settings. While HP's official stance is that lost BIOS passwords cannot be reset without a motherboard replacement, several community-tested methods may help you regain access. Method 1: Using a System Disabled Recovery Code