In this episode, Head Geeks Patrick Hubbard and Lawrence Garvin look at a very puzzling hospital network where a firewall continued to reboot at ever decreasing intervals with a network virus that couldn't be diagnosed. The IT department would reboot it, but over time it would grind to a halt. It looked like a bad box, but then it looked like a virus. The anti-virus said all was fine, so what was it? Learn how their current monitoring setup missed the real problem, and how your monitoring tools can be optimized to avoid the same sort of puzzling issue.