Win 8.1.1, I noticed, that sometimes windows fails to manage cpu frequency - i was watching 1080p flash videos with chrome, and i noticed that it lags much, but it has never laged before. So trying various things i noticed in task manager, that when i start video, cpu stays at its miserable 800 mhz in powersaving mode (though i have set everything to performance and full speed in power management) instead of going to full speed at 2,4 ghz. So without any games i just completely disabled cpu power management in regedit to "solve" this problem. What could be the reason for this bug ?