on a FAT32-formatted USB drive. Insert it while the laptop is off, then hold Windows Key + Up Arrow + Down Arrow while pressing the : HP’s official policy has shifted toward requiring a motherboard replacement

You will need:

The G3 uses a separate MEC5035 I/O controller. This chip has internal RAM that retains the password. You must short the pins or use a programmer.

For the average user, the is a nightmare. If your laptop shows the System Disabled code, try the Backdoor Master Password (Method 1) . If that fails, you have two choices:

Locking yourself out of your HP ProBook 450 G3 BIOS can be a major roadblock, especially when you need to change boot priorities or hardware settings. While modern security makes this more difficult than simply pulling a battery, there are several proven ways to regain access. 1. The Challenge of Modern HP BIOS Security