That would be assuming that the anti-virus protected you against everything, until it broke. It having a hole fits it a bit better, as anti-viruses themselves, have holes. They can't keep up with the rate that viruses are made. Sure it'll stop most of the most common stuff, but there's still plenty that could always make it's way through.
What Windows really needs is a permissions system more like the *nix's. Which they somewhat attempted with Vista and the UAC. But it was just overly intrusive and most people ended up disabling it because of so rendering it useless. They need to lockdown all the system files, since most you can easily just delete and corrupt the install. And only requiring Admin access when trying to access system files/directories.
It wouldn't solve everything but it'd be a bigger step in the right direction than that pathetic attempt that the UAC was.
I know, but just saying. I was partially drunk when I signed up here and filled that out, and got impatient towards the end of all the clicking : D
Edit: also getting late and now I'm starting to notice a bunch of typo's. If a few Spanish words start slipping out don't pay them any mind
Edited by Shrak - 4/5/12 at 8:53pm