So I just ran powercfg /restoredefaultschemes because Windows 8.1 would not let me create new power schemes properly. The result was that suddenly all power schemes were gone. It looks like this (with a few annotations):
Unless anyone knows how to "properly" restore them, I'd like to request these registry keys:
It should be coming from a desktop PC with an Intel processor, because that is the most likely to work. If you are sure that the processor doesn't matter (I'm not), please send me your keys as well.
Of course, all other solutions are very welcome, too