Aspire E15 E5-573G-52G3 behaving oddly when left overnight

I suppose I'll start by saying that I, of course, am aware that you're not supposed to leave your computer running overnight. That said, I was under the impression that this was primarily an overheat concern, and I feel like a brand new laptop that's not running anything taxing shouldn't be having quite this many problems?

IT really seems like the problems are different every night, too. The one consistency is that one or more of my browser windows will be mysteriously unloaded, despite having been left open the evening before. Other than that I've had days where the computer simply failed to exit its sleep mode without a full restart, and this morning the wireless adapter simply wasn't functioning when I woke the computer.

Googling the problem suggests it could be a driver issue, but Acer Care Center doesn't show any new updates and after some incidents with supposedly more recent drivers from Intel's site I've learned not to bother with driver updates that aren't directly from the laptop maufacturer.

EDIT: Further google hunting suggests that changing my power settings should fix the wifi problem, but I'm still concerned about the fact that it sometimes just completely fails to wake up.