There is usually more than one norton component to uninstall in Add/remove. There's the main Norton Antivirus, then Norton Firewall (if you installed that as well), plus there's Norton LiveUpdate and perhaps another one I can't remember the name of. Make sure you uninstall them all. Finally, check the Registry for any instances of Norton and delete them too. Safest way to do this instead of messing about with the Registry manually, is to download and install the free trial version of 'RegSupreme 1.3'. Run it and it will list all redundant Registry entries. Select them all then click 'Fix'. it's never let me down. The trial is fully working. it's so good you might decide to buy it.