I recently bought and installed Norton Personal Firewall 2003, and it seems to be doing more or less what it is supposed to do. I say more or less because it seems to stop me from accessing a few web sites. The one that is creating most problems is the Ryanair site, and can access the site, input information concerning flight dates etc. but it will not let me go any further and book flights. All is OK if I disable the Firewall.