Warn User Before System Restart

Today my Sync navigation session and music shut down while I was driving; just a black screen for about 60+ seconds. I thought my system died. Then it started back up with a progress bar stating scheduled system maintenance was underway, after which it resumed functioning.

It's imperative that the user be warned before this happens; imagine the number of trips to the dealership and calls that can be avoided for users less patient than I am. A countdown timer would be appreciated with the option to delay as in "Windows Update needs to restart."