Happened on my work computer maybe a month ago. The machine is a closed system with licensed AutoCad, Norton Antivirus, and Microsoft Office, and that's it. It was connected to the internet one time two years ago to install everything and has never been used to access the internet since. I still get 'the updates' but there's nothing TO UPDATE and even if there was there's no way for the machine to connect to the internet. Fucking ridiculous.