Because this is a trial period I am pushing the AV out to test machines afterwards and using the method in your screenshot. I thought maybe pushing it out with an agent might be better, but the agent install just fails too. I tried installing the AV via the agent install on a freshly imaged machine and it works. So the agent failing must be because of McAfee.
I have also tried relaxing the McAfee security. I set McAfee to allow the McAfee processes to be stopped, but that did not seem to help.