So, I woke up and my laptop was asleep… for unknown reasons. If it was baterry running low I would know as that message stays and I see it upon waking up the thing. THERE IS NOTHING IN EVENT LOG. Seriously, the last event is a warning from W32time that it couldn’t sync time, then there is after-wake-up events. No “PC going to sleep” or anything. It also most likely didn’t overheat, because if it did it probably would shut down (forced) instead of sleeping.

I am sure I didn’t put it on standby myself, what the hell happened then?