Enabling VM features on a computer is a BIOS feature, so do to it you have to interrupt the startup with the Escape or some other key, depending on the machine. My HP EliteDesk uses the Escape key, but the boot started so fast that my 70 year old fingers could not hit that key fast enough to prevent Windows from starting. A web search suggest that I use the Windows power settings to disable the “quick boot” and actually do a full shutdown and restart rather than a simple reboot. This worked and I could click Escape in time and get to the BIOS settings. After a little searching I found the VM setting (Every BIOS is different) and turned it on. I also added a 5-second delay to the boot settings to make the next time easier.