AVG is free and good.

The best AV is PC-cillin Internet Security. Have used it for over 10 yrs and have no serious complaints. They even respond to queries!!! Relatively modest cost. Their new Anti-Spyware system is fantastic.

Norton is like a bad child, it takes too much time and energy to keep it happy. And then it still is not satisfied. Responses are unheard of!!!

Avoid NORTON Ghost like the plague...you have to be fearless and ruthless to kill it!