I have my IP as Comcast. When I put my new iMac on the network the tech people told me I should download the Norton Virus software from them for Apple computers. They offer it free of change with my IP membership. I do use the Norton for my PC's. Just wondering what advise I would get here. So far I am not using anything on my Apple. Yes I know folks here think there is NO threat from the web for Apple. Maybe using the Norton might slow things down or maybe interfere someway.