The processor is an Intel i7-8650U, it supports vt-x.
You can boot into the "BIOS" by shutting down and then booting while pressing the volume up button; stop pressing once the Windows logo appears. However, in it there aren't any options to turn on vt-x.
I've gone to "Turn Windows features on and off" to verify that Hyper-V is not checked.
I'm trying to solve for this so that I can select Linux x64 in Virtualbox.