ordered from Amazon, because much cheaper than "we are not so stupid", fast delivery, and even with all 3 devices under Windows 7 is easy to install. Unlike other products very stable, does not show any nonsense as alert and functioning properly. But I must say that I have long and short term use Norton on a very annoying Mac Affee switched am (free version of web.de). For me as a normal PC user, it was annoying to get permanent updates that need forever to install, and each 3.te site (no porn, etc.) have been classified as dangerous. Therefore, I canceled it and decided again for Norton and am as before very satisfied with the service again.