The strangest thing happened. I got an update and everything went as normal - until at a point where I had 30% complete and (as is often the case) it tried to do a Restart - changed to a blue screen with 'Restarting' in the middle. That was it, no further changes.
After about 3 hours with that same screen I tried to shut down (single top left button) and it did go yo black screen for a moment, it then just went to the same blue screen. OK tried a 2 button reset - exactly the same, immediately back to the same blue screen.
It was geting late, now about 5 hours after the initial updating process started, so I had to get some sleep. Not having any control over the on/off state of the Surface Pro, I just closed the cover and left it.
The next day (today), I opened the cover and had a black screen - thinking it was the same state as before and that it would go to the blue screen ahain, I pressed the start button - wow! - it started as normal.
Questions: what on earth happened there? Amyone else had such a strange thing happen?