VT-x enabled but still get Pre-Check Error

I have an HP machine with VT-x virtualization enabled in the Bios but am still getting the VT-X/AMD-v error on installation. Don’t know if it’s significant but I’m using an Intel not and AMD processor.
Not sure where to go from here, any ideas welcome!

System has spontaneously started working ???

Hi Colin,

Glad it’s working! Did it start working after restarting or waking up the computer?