An anonymous reader writes "You would think that shutting down software could be fairly simple from an end user's view. If I ask you to shut it down, would you mind shutting it actually down, please? Well, it's a bit more complicated than that, because you need to ask the user if they really want to shut down and if unsaved documents should be saved. And that warrants a patent that also covers Mac OS X. Next time you shut down Windows, remember how complicated it is for Windows to shut down. Perhaps that is the reason why this procedure can take minutes in some cases."