It could have been downloading updates. Mine does that whenever I have left it off for a while, or reinstalled the operating system.
The roof now has a hole in it and a Velux window frame is fixed in place.
Just have to make the flashings now. I have some copper sheet from an old immersion tank I can use. I'll have to get my panel beating tools up to the bathroom.
If you look at RainToday.com you are due a massive thunderstorm in about half an hour - Arch better get a move on