I was successfully able to deploy Flash Player ActiveX. I then tested that I could deploy Flash Player with the firewall enabled and the exception rules in place. This worked a treat, so I clearly have everything set up correctly. The issue was the dcom service was disabled. This was something I disabled in my scripts years ago as I never required it in the past. I am now having issues deploying Firefox. The computer does not even recognise that an update has been sent out. But I will open up a new topic for Firefox in the publishing section as this is a separate issue.
Thank you for your help with getting WSUS Package Publisher setup.
Thank you for your help with getting WSUS Package Publisher setup.