The is not a trivial DIY task. It is not like resetting a desktop PC. HP designed this mobile workstation for corporate security, meaning physical bypasses are intentionally difficult.
Press and hold (or Windows + B for some versions). hp zbook 15 g5 bios password reset
However, a creative workaround exists: . The is not a trivial DIY task
: Use specialized laptop technician utility forums (like Badcaps or BIOS-Fixes) to run your backup file through an automated HP BIOS patcher tool. These tools overwrite the security configuration blocks back to a "clean" factory state. this method isn't accessible.
: This obviously requires already knowing the administrator password. If you've forgotten it, this method isn't accessible.