Hello,
Welcome to the HP Support forum.
With regards to the SpareKeys - the message is fine and expected if you haven't enrolled them but I don't know why these don't work now - may be BIOS issue.
The BIOS can be reset, don't you worry. Most business class notebooks (including yours Elitebook and Probook) have better security.
You will have to contact HP Business Support for assistance on removing the password.
Here is how >> http://www8.hp.com/us/en/contact-hp/ww-phone-assist.html
>> http://www8.hp.com/us/en/contact-hp/business-support.html
HP Business support should be able to send you a customised SMC.bin file and instructions which you can use to reset the password. The assistance for such kind of issues is typically free of charge.
Hope this helps. Let me know if you face any issues.
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*** HP employee *** I express personal opinion only *** Joined the Community in 2013