Hello @kwari
Welcome to the HP Support forum. Thank you for posting.
Most business class notebooks (including yours Elitebook and Probook) have better security. Password cannot be removed here in the forum - 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. Note that assistance for such issues is usually free of charge for HP business class computers.
Hope this helps. Please, mark the post as a solution if it helped.
Let me know if you face any difficulties.
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