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.

Try entering random strings in the password field for some couple of times until a password key is displayed. Take this key 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.