Yeah, my last PC around 2004 came with Norton. Though I consider myself pretty computer savvy (C programmer) I couldn't remove that thing without reinstalling windows.
Removed two Norton apps on a Packard Bell laptop my grandpa chose (and bought) for himself just yesterday. Hope they will not come back. We spend some time teaching him to do basic internet access and (me) assuring that it's no rocket science (by the way, he's an old-school soviet rocket (and not only) engineer, so ;).. )