My Surface Pro 4 recently tried to commit suicide by installing a feature update while having 2% battery left, after I explicitly postponed it. They are never going to learn.
If you aren't at the computer and your computer isn't doing anything then Windows sets a usernotpresent flag. Fold@home or something, make your computer do shit.
Hmm. What's the threshold of activity? And is there a way to clear the flag without doing something wasteful like pegging some CPU cores?