Thanks.
Consider editing your last post and removing the serial number. That is your private information and I have no need for it. ;)
Now I can see it in the BIOS simulator.
In your notebook's BIOS, the settings are in the System Configuration screen, unlike newer models which have an extended section in the Security tab.
I just tried it in my loaner HP Spectre 13 Ultrabook. You will need to disable secure boot and then the option to Clear all secure boot keys or Load HP Factory Default keys will become available.
I am not willing to make such a change on my loaner at this time to test this, since I have the Spectre configured exactly the way I want it for now.
This is why we always ask that everyone please completely identify their notebook, desktop or tablet.
The following image shows what I see when I disable secure boot in my loaner Spectre 13 ultrabook.
