Some users attempt to generate a "System Disabled" code to use with third-party unlock sites, though success on G7 models is inconsistent.
HP provides a straightforward method to reset the BIOS password on many of its models, including the EliteBook series. hp elitebook 840 g7 bios password reset
This is the for the EliteBook 840 G7. You physically read and write the BIOS chip (Winbond 25Q series) using an SPI programmer like a CH341A or Raspberry Pi. Some users attempt to generate a "System Disabled"
Before opening the chassis or spending money, try these three preliminary steps. hp elitebook 840 g7 bios password reset
A: No. KillCMOS and similar DOS tools only work on PCs from the 1990s–2005. They do nothing on UEFI-based EliteBooks.