I have bused Norton for many years but I do not want to keep paying anymore. I know there are free options out there, but which is the best?
I always recommend Panda Free Antivirus.
You can see it gets a perfect score for protection here: https://www.av-test.org/en/antivirus/home-windows/manufacturer/panda-security/
I also like Panda. It is what I have been using for 3 years now. Since it is cloud based, you don't have to worry about it slowing down your PC either.