For the HP EliteBook 840 G6, there is no official "universal" software utility from HP that can instantly bypass or reset a forgotten BIOS administrator password without the current one or prior setup. HP has increased security on newer G-series models, making them nearly impossible to unlock through traditional software-only means once locked. Official Reset Methods
If you own the device:
Q: Can I use a third-party utility to reset the BIOS password on my HP EliteBook 840 G6? A: Yes, you can use a third-party utility to reset the BIOS password on your HP EliteBook 840 G6, but use them at your own risk. hp elitebook 840 g6 bios password reset utility
is a high-end business laptop designed with robust security features, which makes resetting a forgotten BIOS password significantly more difficult than on older or consumer-grade machines. Unlike older models where removing the CMOS battery might work, modern HP EliteBook series laptops store security credentials in non-volatile memory (EEPROM), meaning they persist even without power. Official HP Stance on BIOS Password Recovery For the HP EliteBook 840 G6 , there