For modern business laptops like the HP ProBook 440 G6 , resetting a forgotten BIOS password is significantly more difficult than on older models. HP has phased out the use of "master passwords" and standard CMOS battery pulls for security reasons. HP Support Community Official Solution: Hardware Replacement
On locked HP ProBook:
Carefully disconnect or remove the battery for to drain the stored power. hp probook 440 g6 bios password reset
This information is provided for educational purposes and for authorized users who have legitimate ownership of the laptop or explicit permission from the owner. Bypassing security features on equipment you do not own may be illegal. For modern business laptops like the HP ProBook