Are you currently locked out of the Windows operating system as well, or do you still have access to the desktop? Reset forgotten HP laptop bios password A [12345678] 5 Jul 2023 —

Press and hold the laptop's Power button for 30 to 60 seconds.

Technicians often use specialized software, such as RC Unlocker, to remove the password from a backup of the BIOS file before flashing it back to the chip.

: For advanced users, removing the BIOS chip and using a hardware programmer (like the CH341A) to flash a clean BIOS file is a known technical workaround.

For the HP ProBook 450 G2, the most reliable official route used to be obtaining a customized SMC.bin file from HP. This file is placed on a USB drive and used at boot to clear the password.

The CMOS battery is a small, coin-shaped battery ( CR2032cap C cap R 2032 ) on the motherboard.

If you cannot remember the password, HP's official solution is to replace the system board (motherboard)

You will read the BIOS chip directly, extract the password hash, and either clear it or generate a master unlock using a tool like pyrites (deprecated) or bios-pw (GitHub).

HP generally does not provide master passwords or backdoor codes for this business-class model. Official Reset Methods

Almost never works on 450 G2. Mentioned for completeness, but don’t get your hopes up.