I see Bitdefender has a promo for all 3 of their software ($25), Antivirus, Internet Security, and Total Security. I can't tell if TS includes everything from Antivirus and Internet Security?
What I think is no single step or single layered security system is enough, so need of a Total Security Software is required and I think it includes antivirus and internet security like a firewall as well.
I have the total security bitdefender suite and is an incredible solution.
However if you don't want to spend money or you are curious they offer a free version:Bitdefender free.
Tried that too.Has the same engines and tehnologies but lacks some gimmicks and is highly automated...not much to set up.The paid versions offer acces to some settings. bitdefender free