@Dieter71 The intelligent updater service was available for OLDER versions of Norton products to get virus definitions without having to get the newest Norton product version at the same time. That service has not been depreciated and is no longer available per this announcement:
Versions 24.xx and higher are on line only definitions and do not have a regular way to update via a download and install without service connections like the previous service. To the best of my knowledge one isn’t in the works either.
SA