Make a couple of trials (i think 3) so that you can get a password key. Take this code and:
- Go to https://bios-pw.org/
- Key in the key code that you have in the input field and click on Get password button
- A list of generated passwords will be displayed depending on the model of your computer.
- So select your matching password and set it to unlock BIOS.
PS: Save it somewhere for further usage, otherwise, retry the above steps in case you got to unlock BIOS again.