I would not recommend changing the actual provider if possible. If you got on with the Norton AV why change £21 is not bad as long as the thing works. I had a major issue upgrading the symatec version due to a really uselless uninstaller. This was realy poor show by symatec.However if you do get an issue you may need support which Norton does have. It is OK for all to say "my PC has ran fine" but what happens if you have a problem? I have also used AVG & found it worked fine but you may have a problem unless you totally remove all of the Norton files. Then if you find you preferred Norton good luck on installing afer AVG was installed.