When you play a video on a computer that is running Windows RT 8.1, Windows 8.1, or Windows Server 2012 R2, the video is jerky and not smooth. Additionally, the CPU usage is increased.
This issue occurs because the hardware video constriction by the graphics processing unit (GPU) fails, and therefore Windows has to use software constriction by the CPU.
To resolve this issue, install update 2919355. For more information about how to obtain update 2919355, click the following article number to view the article in the Microsoft Knowledge Base:
2919355 Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 Update April, 2014
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates