Red Squirrel
No Lifer
If it's behind a router, it wont contribute to botnets, unless a virus comes through as another means such as an email, at which point it does not matter how well patched you are. What's irresponsible is putting ANY computer straight on the internet with no proper protection. There will always be exploits that are found at some point on any OS, especially Windows because of all the crap that runs and has opened ports with exploitable apps. RPC is constantly being exploited. The OS itself cannot be your protection.
