I have to disagree, I payed for Norton and it screwed my system up.I do hesitate to use any free anti-virus though. While I agree it would be better than nothing I doubt it would be as good as a pay for program. That isn't to say anything you pay for is good.

I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!