As I've recently read on reddit, this "fix" changed my cpu usage from 10% to only 2% (browsing internet)
which is an 8% improvement since I've done this fix.
my fps also improved (especially I could run Tera from medium to high on everything (wtf?))
now you're wondering, how I've done it.
To start, press Windows Key + R, this will open the run window:
in the box type: services.msc
this window will pop up:
now click on "name" on the top bar till the arrow points up, as in the above screenshot.
Then search for: "NVIDIA Streamer Service"
right click it and press "Properties"
the following window will pop up:
now click on the button "Stop" on the near bottom to stop the service.
and set the "Startup Type" on "disabled" (just above the stop button)
Note: This will disable the capability to use a NVIDIA Shield, so if you have one and stream your games to it, don't disable it.
You can find the original post here: http://www.reddit.com/r/pcmasterrace..._cpu_usage_by/
Credits for the guide go to lhikary from reddit, I made the more detailed guide.
Hope you enjoy.