Hi! @Pstai, Thanks for stopping by the HP Support Forums!
I understand your laptop is locked with BIOS Administrator or power on password.
Don't worry I'll try to help you out.
Did you make any software or hardware changes on your PC?
Please provide the product number of your PC to assist you better.
The administrator or power-on password prevents anyone from starting the computer until they enter the proper password. With the power-on password enabled, the screen remains black, and you are prompted to enter a password as soon as you turn on the computer. The power-on password is set (enabled or disabled) in the System BIOS option window. By default, the power-on password is turned off.
If you have tried entering the password more than 3 times the password will get locked and you have to contact HP support for service options.
If the issue persists please contact HP.
Link to contact HP.
Also, Refer this article to know more information about power on passwords.
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A4Apollo
I am an HP Employee