I use Avast! Its free for home use and is reliable!
It has the resident protection and I scan my PC once every 2 weeks. I have not got a virus in the past 3 to 4 months (even though I am a hardcore Internet user!)
It has the resident protection and I scan my PC once every 2 weeks. I have not got a virus in the past 3 to 4 months (even though I am a hardcore Internet user!)