Having purchased my son a computer and installed a wireless Internet Connection I forgot to put on some form of security when the free 3 months (?) expired! Over the last 2 months he has been having problems with 'pop-ups' which are now so bad it crashes the internet as soon as he tries to connect. I want to install some security, however, don't I need access to the internet via his computer to do this? If yes, how can I get rid of all the pop-ups? Any ideas, I'm getting fed up of him using my computer all the time now he can't access the internet via his!