HP provides a specific key-press sequence for G7 through G10 business notebooks to reset the CMOS, which can sometimes clear temporary glitches, though it may not always remove a set BIOS administrator password.
If you previously configured , you can recover or reset your password by answering three personal identification questions. hp elitebook 840 g7 bios password reset
If the above fails, plug in the AC adapter, turn off the computer, and press and hold Windows + V . While holding these, press the Power button for 2–3 seconds. 3. Official HP Support (The Recommended Path) HP provides a specific key-press sequence for G7
For business-class devices like the EliteBook 840 G7, HP's official policy states they cannot reset a forgotten BIOS password remotely. While holding these, press the Power button for
A screen will appear prompting you to press for HP SpareKey Recovery.
Turn on the laptop and immediately tap the key to enter the Startup Menu. Press F10 to enter the BIOS Setup.