General

Avira is a good one.

I use AVG

I'd say Avast, I recommend it more than AVG...though I personally use Kaspersky.

Well I've had Malware Bytes with an Anti Virus to like Avast to first AVG and all of that stuff however my dads friend is a computer technician and he was fixing my computer one day and he just recommended flat out AVG as it is like the "bang for the buck" sort of deal , I get the fact it's free yes but I mean I have it, I have no regrets really. I like it, simple and easy to use. That's it.

That's just my two cents though.