Norton is 4th lol.
If you're willing to spend $60.00, get Kaspersky Anti-Virus. If you're willing to spend $90.00, get Kaspersky Internet Security 2010 or the new 2011, although I'm not sure of the price on the 2011. Otherwise I'd personally stick with ZoneAlarm. One of my very computer-savvy friends has it and he loves it.
BitDefender or Kaspersky or McAfee.Ignore the people who say Avast is the best. I tried it and it did not do stuff.
It did block malware for me.Far from stuff. OP needs adblocker.
Lol. Not even a top 20 Antivirus.Ignore it.