You have to deploy a policy to stop this
Typically any machine we use in a high-stakes presentation also will have the WSUS service disabled as well.
That said, you can pry Windows 7 out of my cold dead CPU if I have to use a MS operating system. I have an almost pathological hatred of pop-ups and advertising of any kind, beneficial or not. I go to great lengths to keep from seeing advertising. Perhaps if everyone was like me, no one would make money and the economy would crumble. If your site has an annoying, blinky ad that can't be blocked, or is one of those that force you to enable ads to continue, we're done. I'll find an alternative vendor.