I have a license for AntivirusPlus 2013 and have been very impressed so far. Although I've tried other AV's for the last 15 years or so, I kept coming back to Avast until I found Bitdefender and I'm pretty much sold on it now. Congratulations on the terrific product.
I was thinking of switching my other machine to BD as well but the question I have is why wouldn't I choose the free version vs the paid? I can't find any comparison on your website or on the net.