If you cannot verify ownership with HP, the only remaining "free" method (if you have the tools) is to physically replace the BIOS chip EEPROM programmer
Usually, No.
Go to one of these free generator websites (use a different device): hp zbook 15 g5 bios password reset free
during the initial setup, you can reset the password for free by answering security questions. Turn on the laptop and press repeatedly to enter BIOS. When prompted for a password, press to launch the HP SpareKey wizard. If you cannot verify ownership with HP, the
Open the back panel and locate the small silver coin-cell battery. hp zbook 15 g5 bios password reset free
If the code generation fails, the next free option involves hardware manipulation. Warning: This can void warranties or permanently damage your motherboard. Perform at your own risk.