Download and install the HP System Software Manager (SSM) or the HP Bios Configuration Utility (BCU) from the official HP website.
Turn off the laptop, remove the main battery, and unscrew the back panel.
For corporate environments or individuals who hold proof of purchase, contacting HP Support is the safest and most reliable approach. how to remove bios password hp elitebook 840 g1
For technicians with a CH341A USB programmer or similar.
: A prompt will appear asking you to press F7 for HP SpareKey Recovery. Download and install the HP System Software Manager
Type a random password and press Enter. Repeat this process three times.
He restarted the laptop and pressed the F10 key to enter the BIOS settings. He then navigated to the "File" menu and selected "BIOS Defaults". The laptop prompted him to confirm the action, and John selected "Yes". For technicians with a CH341A USB programmer or similar
Press and hold the power button for 30–60 seconds to discharge any remaining power.
On the 840 G1, simply pulling the CMOS battery will reset the clock but not the password .