I have my system (Win 7) set up to run a full scan every night. I have to check every morning that it actually ran. Occasionally the light on the icon would turn red and then I would find that the scan hadn't run for a week!!!! Why didn't it tell me as soon as there was a problem? I have to reboot my computer and then the scan runs, for a few more days. There is no problem with my Win XP system which has Norton configured the same way. This is the latest version.
In addition, and probably because of, I regularly receive viruses that delete my entire Thunderbird inbox. When I delete the message with the virus it then deletes the trash as well.
I am so frustated by these problems which never get fixed. I think Norton is just coasting on its reputation at this point. My subscription expires in 70 days and unless the situation gets better by then I will be switching to a different anti-virus.