I like Kaspersky. I used Norton for a long time before but found that it was always popping up with some kind of message bugging me while i was working. Plus it really slowed my computer.
I am surprised to see Avast not included in the list. The free version of Avast works just fine for me
Nod32 and kaspersky is the best. go try them out, if you haven't tried yet. Be away from warez. Buy legit.
my opinion id that Kaspersky is too heavy and slow program, NOD 32 is very popular , and it seems to be pretty much OK. Now I use Avast and I can say only good words about it. Avira is also not so bad.
try malwarebytes. search it on majorgeeks.com. its great with viruses and it even has a real time setting that u can use which will keep virtually any viruses out of your computer. and it can be used in conjunction with a virus/spyware software like mcAfee or Ca etrust security suite. t wont slow your computer down because of the additional virus protection software since it just removes viruses/malware/spyware but it may be all u need. so get it a shot