This could also be due to many machines not receiving the Anniversary Update yet.
My machine at work has not received it yet, although I may manually get the update on a quieter day.
Another person at work with a laptop has the update stuck trying to install in a loop as it does not seem to be compatible with the HP ProtectTools full disk encryption software. Basically the update starts to install, reboots and shows a 'Recovery' screen and then reboots back into Windows as if the update never started, then a day or two later that update attempts to install yet again. So he's put it off until he gets time to remove the full disk encryption to install the update.