I need to run some virtual machines locally using VirtualBox and had some difficulty at first with the BIOS.
I updated to the latest revision from HP, and could not find the location of the VT-x options.
Not a very intuitive menu system and my lack of trying harder to find it resulted in coming across this article which pointed to the correct location.
BIOS > Security > System Security > Virtualization.
That’s it. I was looking in all the wrong places because I wouldn’t think to look in security options for VT options. It should have been it’s own menu.
[Activate virtualization (VT) on HP BIOS (s12), last update 2017-12-08]