Well, I see what you mean there, but from a lot of experiences I've had, the viruses can mostly be avoided by not downloading from questionable sources, and pressing the correct buttons when downloading a legit software. Also, keeping your softwares up to date and avoiding obviously fake ads and e-mails and websites. You can get a billion dollar security software, but humans will always be the weakest link with it. The clicking of even one wrong file can wreak havoc on your PC (or mac). That's why I just make sure I know exactly what download packages give me and watch for anything suspicious.
Well the advice you're giving is good and all but it operates on the fact the user in question can tell what is and isn't a questionable source. Which is why the use of Anti-Virus software is so prevalent. Most people aren't taught or bother to learn about anything computer related because of the minor stigma around the whole thing. If you require proof of the stigma just refer to popular television dramas that have some sort of tech guy in it, when they explain what they did sometimes in minor detail(albeit the writers often have no idea what they're talking about and just throw out key words to sound smart) they'll be told to "speak English." (Random tangent op)
note: the left monitor is smaller than right because the right one is a 1080p monitor while the left one is a different resolution.
