The easy way in order to get access to the bios when it is protected by a password, is to remove the battery on the motherboard and boot the system again, but what to do, if the solution didn’t help?
like in some laptops.
Solution:
you can try to find a firmware of the motherboard or a laptop and just update it. All the settings will be dropped to the default one including the password.
after rebooting the system, you will have the full access.
Thanks for the manufactures which keep the hardware and firmware updated. 🙂