Are you able to run other ISOs normally? Even something like ZorinOS or Fedora, just to see if that would work normally. If yes, then it might be this Windows ISO in particular or might need more resources allocated than what is claimed in their website. Of perhaps you need some specific parameters on the software in question.... I'm afraid those are all questions I can't really answer.
Obviously, higher specs tend to be better, but I'd still try to run something else to confirm if the issue is with your hardware.
I'm curious too, I have another computer with 8GB of RAM too, I might try it throughout the week to see if it's able to run this smoothly. What's your host operating system? Nvm, I just checked you posted above. Will try with Z16.