If your HP ZBook 15 G5 is still locked after all attempts, you have one nuclear option: .
HP ZBook 15 G5 , resetting a BIOS password is more restricted than on older consumer laptops because it is a business-class device with enhanced security features. Unlike older models, simply removing the CMOS battery generally clear the BIOS password on this machine. HP Support Community
Removing the battery will reset the system clock but will not remove the administrator password. Reset bios password on HP zbook 15 hp zbook 15 g5 bios password reset
Alternatively, technicians flash a clean, unprogrammed BIOS dump file corresponding exactly to the ZBook 15 G5 motherboard model, then rewrite the original Serial Number and UUID using HP configuration tools (HP DMI Tool).
: Keep your new BIOS password saved inside a dedicated, encrypted password manager rather than relying on memory or physical notes. If your HP ZBook 15 G5 is still
if the password is lost, which may incur costs if the device is out of warranty. BIOS Reset (Settings Only)
The HP ZBook 15 G5 is a powerhouse workstation, but getting locked out of the BIOS can bring your productivity to a screeching halt. Whether you inherited a device with an unknown password or simply forgot your own, resetting the BIOS password on this specific model is more complex than on older laptops. HP Support Community Removing the battery will reset
In many cases, the only supported solution is a system board replacement , which may involve out-of-warranty costs. 2. The "System Disabled" Code Method
If you are trying to fix a boot loop or corrupted settings rather than a forgotten password, a CMOS reset might help.
: Removing the CMOS battery does not reset the password on these models, as the credentials are stored in non-volatile memory (EEPROM) that doesn't require power to maintain data.
Write down this code exactly. Note the date and time shown on the screen.