Stops 100% of unknown viruses? (Score 5, Informative)

Umm, you can't do that - I think I first saw the relevant paradox in Ralf Burger's book on viruses and it goes something like this: Say you've got some blackbox routine called is_a_virus() that does just what these guys claim; all you do is build it into a virus like so:

if ( is_a_virus(me) ) { do_nothing() } else { replicate() }

So, if you're a virus, you're not a virus - but if you're not, you are. Reductio ad absurdum, anyone?