Did you get just the map update or a set of three cards to update? I did the maps and it still rebooted. Mark is sending another set of software cards and card to update the clock (always 12 hours off).
I updated mine , but did not test it yet. The problem that I had with the GPS not coming up after update is fixed. I had to re-address the GPS shortcut. After update it loss where to find the exe. File.