Use Avast free antivirus. Its good and free. Check at http://www.avast.com Before I use to use Norton Antivirus but last year I had some issues with antivirus and I contacted Norton. But support from Norton is very bad, I received response back like a month later from som indian support guy. Then I thought why pay for antivirus when you can get it for Free and start using Avast antivirus. I would say Avast is much better than Norton. Hope this helps.