For many years, a common method used by IT technicians to unlock HP ProBooks involved the use of an file. This is a specialized binary file provided by HP to authorized service partners, though it has circulated within the tech community.
Small Phillips screwdriver, tweezers or a paperclip, anti-static wrist strap (recommended).
If you’ve tried the code generator and it didn't work, stop typing random passwords. Every failed attempt brings you closer to a permanent "System Disabled" lockout that requires motherboard replacement.