Comment by estimator7292

The bit we all care about: S3 is sleep mode proper. Most everything is physically powered off, only enough is kept on to keep contents of RAM alive.

S0 is.. just on. The PC is completely powered up. Microsoft has done this so that they can force your computer to wake itself up to install updates you don't want. Literally you aren't allowed to turn off your computer because some middle manager needs to see update stats go up. If your computer happens to be in a bag and cooks itself to death, well that's your problem. Fuck you for trying to keep Microsoft's statistics down.