And ya, always OT.
The only 2 issues on win 8.1 that I can't accept is, they broken the non-unicode software language, so many software are affected, for example, Adobe.
The second one is, the mouse, they mess up the direct input for mouse, which many games are affected.
I just need make sure this 2 are fixed first, then I will see how's optimus going, as optimus/enduro has some improve in windows 8.1, then I will install it to find out how's going on the core-parking and other power save feature.
As I know, windows 8.1 increase more performance for game that CPU bound, so it is a must for me too.