I'm using Nod32 as my Anti-virus. The AVG free one hasn't been that great for me in the past. My laptop caught a few bugs but AVG didn't detect it. So I decided to install Nod32 and automatically it picked up and cleaned those bugs during the scan. Also, if I didn't clean those bugs Nod32 would mark them as malicious software and just block them from connecting to the internet which was very convenient .