Hello after a long time I finaly succeded ,, yes my norton antivirus 2005 works like magic .
If you want a keygen to work you have to remove your old norton antivirus then remove all files left behind ( by hand ) make a search and delete all files , then you can think about intalling norton 2005 and the keygen .
Like a lot of people my norton didn't accept the key but after a good cleaning it worked like magic :-) .
Good luck .