I see that there is a 1 and 3 user Internet Security. With the 3 user, if I understand it I can use it on 3 different computers? If one system gets infected with three months left and has to be reformatted, is it possible to call Norton tech support and use the same key even after it has been loaded 3 total times. I'm concerned that I may not be able to get the full year of protection on each of the 3 computers.