AVG is a piss in the ocean that is that badness of Norton.
i'm not a massive AVG advocate... but as a sort of everyday, blanket solution it's not a terrible one. malwarebytes anti-malware is one of the best of the current crop that i've used... the free version doesn't have realtime protection, but for $25 you get the full deal. i generally rely on my internet nous to avoid viruses, but occasionally i give it a scan just in case... so i get by with just the free scanner. now that i've actually looked into it and am aware that the full version has the extra features i might just lay down the cash, though.