> I think the premises of your syllogism might lead some to another > conclusion---that the livelihood of the AV software houses depends upon > the innate insecurity of the Windows OS.
Hmm... they don't actually need that: they only need people to think that they're vulnerable (regardless if their Windows is actually secure or not, and regardless is Windows is more or less secure than other OSes). But yes, this is made easier if Windows is actually insecure. Stefan