Gosh, the possibilities are endless. Heart-lung machines running Vista crash randomly. Dialysis machines pause while they download and install 27 new patches then have to be rebooted. Hospital administration forget to pay licensing fees or Vista erroneously decides it’s a bootleg copy, and the operating system then cripples itself.
You didn’t know Vista could cripple itself if it thinks you’ve been naughty? It sure can. Want to bet your health on Microsoft healthcare software? I don’t.