I have Windows XP, Windows Vista and Linux on my home computer. I want to be able to use norton on Vista and XP without having to buy it twice because it clearly says that it is for one computer, not one operating system. Vista will not let me run the installed copy of Norton that is on XP and vice versa. Norton for Vista only has a 31 day trial whereas I have a full year with XP. Is there a way to get it on both (I do not care about linux having it).