Note down the 8-digit code displayed (ignore any leading 'A').
On the ProBook 450 G2, this rarely works alone, but try it before soldering.
Following advice from HP Support Community experts, Marcus entered the wrong password three times. On many HP laptops, this triggers a "System Disabled" message with a 5- or 8-digit .
The easiest way to regain access is by using a recovery code. Turn on your laptop and press to enter the BIOS.