BIOS password

[RedBankPC]

I have a customer who has brought in an HP laptop and asked me to install a fresh copy of Win 10.  I powered it up and immediately received an Administrative password request.  I took the system apart and removed the CMOS battery hoping that would reset it but, of course it didn't.  I called the customer back and asked what they thought the password might be.  They gave me 3 different things they say it could be.  I've tried every combination of Capital letters, etc.  Nothing is letting me in.  I used to be HP certified in a number of areas, always loved the products, and recommend them to all my customers.  I don't want to have to call these good people back and say they need to throw away their laptop because there's nothing I can do for them...outside of replacing the motherboard.  Certainly HP must have a backdoor code associated with this serial number, right?  I called tech support and 2 different people said they don't deal with BIOS passwords.  Anyone have a solution...PLEASE?? 

[Cheron-Z]

@RedBankPC

 Thank you for using HP Support Community.

According to the Community's Rules of Participation:

4d. No posts shall include instructions or directions intended to bypass or subvert security measures, including passwords, locking mechanisms, fingerprint scans, etc., or to bypass any safety measures.

Therefore, this topic is being locked. If you would like help resetting the password on your product, please Contact HP support in your region.