In the good old days (last year?) HP business laptops had a security feature protecting the admin password of the bios.
It cannot be reset, other than getting a small file on a bootable USB drive.
This file is made by HP support against the Serial Number of the device.
You have to open a support ticket to get it.
It seems that HP no longer consider this secure enough.
This service is no longer available. Now, the only way of recovering the admin password is to replace the main board.
Chargeable of course.