(http://s22.postimg.cc/n95jvrr1d/microsoft-game-bar.png)
With Windows 10, Microsoft has included a few gaming features to make it easier to game socially via the firm’s Xbox gaming social network.
The Game DVR feature, or captures, records ‘cool’ or ‘epic’ scenes from your gameplay that you may want to share, often capturing clips in the background and automatically saving some clips which can be triggered by game developers. Game bar lets you control gaming features linked to game capture like this one, it can typically be invoked with Win + G or the Xbox logo on your controller.
These features often have a performance tax, however slight, and for those who prefer to game without these features, Microsoft has included an option that lets you turn them off easily via the settings app as we’ll show you below.
How to turn off Game bar and Game DVR for Windows 10 with your Windows 10 PC
1. Open Settings > Gaming
2. Turn off “Record Game Clips, screenshots and broadcasts using Game Bar”
3. Turn off “Open the Game bar with the Xbox Logo button" on your controller.
4. Navigate to Settings> Captures (previously Game DVR)
5. Turn off “Record in the background while I’m playing a game.”
source (http://mspoweruser.com/how-to-turn-off-game-bar-and-game-capture-on-your-windows-10-pc/)