So I tend to use my notebook as kind of a backup for my multimedia files on my desktop pc...
I accidentally delete all the music files from the notebook - oops. Recycling bin isn't big enough. Fair enough, my bad. The files are all still on the desktop. Start copying them from the desktop to the notebook. It'll take about three hours.
Ninety minutes into the process, the notebook apparently downloads an update from Microsoft and decides this would be a good time to reboot. I'm in another room as I hear the shutdown music on the notebook.
I write software for a living. If I were going to make a computer automatically reboot, I'd make certain that the computer wasn't in the middle of something.
I love Windows... I now have nightmares of someday being in a hospital, hooked up to life support run by a Windows machine. Which decides to reboot for some critical updates...