Ok, so I'm not here to favor anything. if you would look at this review: you can see that Bitdefender is 1st, 2nd: Kaspersky and Norton: 3rd. http://anti-virus-software-review.toptenreviews.com/
Ive tried kaspersky first in windows 7 then norton14 now in win8.1 (bec. kaspersky 2014 doesn't support 8.1 presently)
very clean and user friendly interface.
i would say :
web detection and ad/banner blocks = kaspersky>norton
in norton i think i have to use adblocker while in kasperky, you don't have to.
updates: kaspersky>norton. norton seems to update databases like every 5 minutes, kaspersky does in every 6 hours or so whenever a new update is available.
but i would say that for a torrent dependent user. whenever an update is commenced, Kaspersky has this strict security that it will detect that your key is invalid, or fake after a month or so. So keys are downloaded and changed in a monthly basis. You can't find Trial resetters that often.
|Norton on the other hand has trial resetters that lasts for half a year so updating isn't that much of a hassle.
what's great about norton is it's included vault and toolbar on you browser which acts as a password manager... While in kaspersky you have to buy, a seperate password manager
if not for the vault, i will stick with kaspersky with that cleaner interface
http://anti-virus-software-reyom/ and my own review