Part of the problem with PC vulnerability to malicious attack is simply the larger number of users. I don't have the stats but most people use PCs, so the best way to wreak havoc on the most people as a hacker is to write hacks for PCs. An expert on malicious code once said you can write harmful code for a Mac, but why bother. That of course does not mean a crashed windows PC now works because it is among the majority and the vulnerability difference is actually a pretty good reason to switch to a Mac. I am just making the point that as far as harmful code is concerned there is no magic about Macs they are just as susceptible as PCs to attack. I will stick up for PCs in-as-much as I have been using them for the last decade with only minor trouble. I had to reload windows xp on my present machine a few weeks ago after it crashed from an attack that got around McAfee somehow. It worked fine for 4 years before that and reloading windows fixed it. I would say dump McAfee if you want to dump something.