try setting you default power mode to high performance. Of course that might keep your fans running. If you're brave you can go into 'Group Policy' or the registry for a fix but it not clear those work either, and have a good back-up first.
what adds to the confusion is that some reports are that after you do this, task manager still reports efficiency mode is applied even if it isn't.
I've been using a Mac more and more recently and the intel boxes run Linux for everything except Solidworks. I'd really like to be completely done with MS but I can't get off that and couple other critical equipment control application that are only available in Windows.
The stupid irony is that I'm only in Windows maybe 5% of the time I'm on a computer, but still spend at least 50% of my total system maintenance time keeping up those windows shells I hardly use.