Updating your computer is almost complete. You must restart your computer for the updates to take effect.
Do you want to restart your computer now?
Whoa! At least it's better than that "Your computer will restart in 5 minutes no matter what and I don't care if your name is Bill Gates and you're in the middle of a very important demonstration at the moment, so TOUGH LUCK."
For those of you who might be wondering how this could have happened, I run as a non-administrator on that computer and I "Remote Desktoped" back to my own machine as the administrator to install this Patch Tuesday's set of updates. I wasn't quite ready to reboot, but Windows just needed to insist.