This is an HP Z-220
My issue was that I couldn't see any indication of how to get into the BIOS because no message was shown. The only message that is visible at start-up was saying to hit CTRL-S which took me to the Intel Boot Agent BIOS which had nothing useful.
I resolved this by hitting all the F keys like a mad man when the computer started and somehow I ended up in the proper HP BIOS which indeed had VTX disabled which I changed and now all is good.
Thank you all for your feedback !