If you're still having trouble resetting the BIOS password, you may want to consider contacting Lenovo support or a professional computer technician for assistance.
Power off the computer and disconnect the power cord and all cables. lenovo thinkcentre m720q bios password reset
If you're unable to reset the BIOS password using the above methods, you can contact Lenovo support for assistance. They can provide you with additional guidance or dispatch a technician to help you reset the password. If you're still having trouble resetting the BIOS