I used to do this for a living, so I pretty much what I'm talking about.
Maybe he didn't update avg, I'm not sure.
The paid avg and norton 360 cover a wider scope of things than the free one.
The only one surpassing the regular good anti viruses is kaspersky, which is a royal pita if you don't know how to configure it.
For regular mortals avg (the one mentioned above) should be more than enough.