I only use free and that is for the only
computer that hooks up to the Internet.
I recently dumped AVG and went to Avast because it has an on/off switch. I need that as I have a collection of programs that use a memory location that all AV programs identify as a potential virus. So, when I run those programs I just turn it off for a bit. That's very handy and not many AV programs will do that. In fact, most want total control over your
computer.
AV protection is one thing. But most AV programs are just that - anti-virus. They will not detect other forms of malware which can wreck havoc or at least make you pull out your hair at times.
I run a slew of malware checkers every Sunday morning via a script. Just good housekeeping.
No one should ever allow the
computer which runs their printers, plotters and design software to access the Net, ever. Then your only worry is when someone walks into your shop with their files on a thumb drive which can contain malware. When we get those, we plug them into this
computer and transfer the files to our own thumb drive which we then transfer to whichever work
computer we need to use. A few minutes work but great protection. Luckily most of our stuff comes in by e-mail and the files too large for e-mail (a rarity) are hosted on a Web site where we can download at our pleasure.