I personally use Comodo Internet Security
which comes with the AntiVirus and Firewall programs. It's completely free so there's no upgrade question, only notifications about program access to your computer. This can get confusing sometimes and annoying for those who don't like the feature, but hey, give it a whirl and if you don't like it, stick with AVG or even better, Malwarebytes.
Humans are the only creatures that won't live up to the their potential. Give everything your all. When you die, die on E.
So I ask you, what do you intend to do now?