Greetings,
Welcome to the forum.
I am not a HP employee.
Your PC was released for sale in 2009.
I don't think HP was including a USB BIOS recovery option at this time.
This HP Support site (Link) details instructions on how to create a BIOS update USB stick but I don't think this option will work with your PC.
Look at "Update the BIOS when Windows does not start".
Regards