If none of the above methods work for you, you can contact HP support for assistance. They can provide you with guidance on resetting the BIOS password or even replace the motherboard if necessary.

If all else fails, a motherboard replacement from HP will guarantee a cleared password, though it’s the most expensive option.

If the password prompt appears on a black screen before any boot options, you are strictly in a pre-boot authentication environment. In this scenario, the HP BCU method will not work because you cannot reach Windows. Your realistic options are Master Password Generators or the EEPROM programming method. If the laptop is still functional, you can try an HP-supported "hard reset" by disconnecting the AC adapter, removing the main battery, and holding the power button for 15 seconds to drain residual power, though this is more effective for clearing stuck hardware states than passwords.

If you can access the BIOS with your administrator password, you can reset BIOS security settings through the built-in interface:

: A long string of numbers and letters displayed after incorrect password attempts. 2. Contact HP Enterprise Support Navigate to the official HP Customer Support portal. Log in with your business or personal account. Initiate a support ticket for a forgotten BIOS password.

Contact HP Support through their official enterprise channel.

Plug it into the ZBook, hold , and power it on.

Companies specializing in BIOS unlocking can:

If you bought the device used, contact the seller for the "Management Password."

Repeat this process three times until the system prompts you for . Press F5 to initiate the SpareKey sequence. Answer your three security questions correctly.

Answer the three pre-configured security questions accurately.

BIOS Password Removal/Reset Options for HP ZBook 15 G5 Date: October 26, 2023 Status: Informational / Technical Guide

Save time by ignoring outdated forum advice that does not apply to the HP ZBook 15 G5: