How many people do you Personally know who have actually had a problem with any sort of Virus simply using a computer as typical users do -- If you use torrents / dubious downloads / open emails without checking that you know whose sending them first etc etc then OK - but actually I know literally 1000's of people none of whom who have ever had a computer virus in their lives.
I feel a lot of this stuff is just paranoia these days -- the main Virus creating Hacker groups have moved on to much more lucrative pickings these days.
I still maintain it's a huge number of people who have vested interests to protect who really are keeping the whole issue alive.
With standard AV protection and intelligent computer usage there's almost ZERO risk in getting a computer infected these days. Most attacks come from things that no amount of Software can protect you against.
When for example driving on the roads - there are literally zillions of possibilities of having an accident - but usually the chance of having an accident is thankfully mercifully small - and even here it's shown that careful drivers tend to get involved even in seemingly random accidents far less than slightly less careful drivers.
The risk these days of computer infection for careful users is still tiny -- anyway if you need AV software on top of the base supplied by Ms go for it -- but quoting a lot of PAST statistics on what is "the best" protection is meaningless in the absurd anyway as everybody tends to use computers differently and will never even by accident logon to some of those "fake websites" where this stuff could be loaded on to your computer.
By all means load up your PC with whatever you feel you need -- however most of this stuff isn't really needed anymore as far as the HOME environment is concerned -- most youngsters even when loading from Torrent sites are downloading movies / TV shows / music - and provided the file is a proper multi-media file there's zero chance of an embedded "nasty" in it -- an mkv file for example won't play if it's corrupt etc. Most of the well known sites ("Jolly Roger / Costa Rica Felines" etc. -- can't specify the specific links of course) actually check torrents regularly and there's almost zero risk of any infection from those sources.
Of course illegal software downloads is another matter - but if you do that you deserve what you get anyway. !!!!!