There are online generators and utilities that can calculate a master password based on the "System Disabled" code you see on the screen.
Try Method 1 first. If no "System Disabled" code appears, proceed to Method 2 . If you aren't comfortable with hardware, take it to a local PC repair shop (should cost $30–50). How To Reset Bios Password Hp Elitebook 840 G3
Provide authorized users and IT admins a clear, safe workflow for resolving BIOS password lockouts on HP EliteBook 840 G3 systems using supported, legal methods. There are online generators and utilities that can