If you still have access to the Windows operating system with administrative rights, you can attempt to clear or change the password using the HP BIOS Configuration Utility (BCU) Download and install the Command Prompt as an administrator. Navigate to the utility's installation folder. Run the command: biosconfigutility64.exe /nspwd:"newpassword" to set a new administrator password.

Resetting the BIOS password on an HP EliteBook 840 G6 can be a challenging task, but it's not impossible. By using the HP BIOS password reset utility or third-party utilities, you can reset the BIOS password and regain access to your laptop. Always be cautious when using third-party utilities and follow the instructions carefully to avoid damaging your laptop or losing data.

Older guides suggest using debug.exe in DOS or shorting the SCL/SDA lines on the I2C bus. These methods died with the Ivy Bridge architecture (circa 2012). On the EliteBook 840 G6, these attempts will result in a permanent brick requiring a motherboard replacement.

If the above fail, some users turn to hardware-level resets, though these carry risks of bricking the device or voiding warranties. How to open the BIOS on your HP computer #shorts 10 Nov 2021 —

file tailored to your machine's UUID to clear the password. However, current HP policy for newer models often requires a motherboard replacement