Ok boys this is a great antivirus, I got ride of Norton. MacAfee was sold to do not know what will happen to that antivirus software.\
Go to
http://www.trendmicro.com/en/home/us/personal.htm
I would recommend you all upgrade to this one, why do I say this.
There is little to no overhead at all. I have been using this for my business with the files sharing and imagining that goes on and it has not affected the network or Stations performance. Just excellent software.