Following everyones advice I have successfully got a wireless network working where my laptop and my daughters computer can each go online via a Belkin router. Each computer has Norton and a firewall. my young sons computer could do with being added to the network via a usb wireless device BUT can I route his stuff via my computer so that I can use my antivirus or must I also buy him an antivirus for his machine as he will have direct access to the web via the router? Hope this makes sense.