Damage makes a good point AVG is crap, I've been using Nod32 for years now and never had any issues. I still use the old version its like 6MB lol and I get updated username and password online to get the latest updates
I've also heard bad things about AVG too, I use Avast and sometimes it picks up false positives too, but not every often, and it's easy to allow them too if you know they are not a problem. Never used NOD32 but I use to use Avira, but the damn pop up ads kept pissing me off so I went back to Avast