http://www.pcgamer.com/microsoft-acknowledges-windows-10-stuttering-problem-a-fix-is-in-the-works/

Microsoft rolled out the Windows 10 Creators Update in April, and it wasn't quite smooth sailing for everyone. Reports of stuttering in games quickly began to surface—not universal enough to prove there was a problem, but persistent enough to suggest that something, somewhere was amiss. In a recent post on the Microsoft support site, Microsoft support engineer Paul Aaron acknowledged that there is in fact a problem, and that a fix is in the works. 

"Thanks to all of you who provided feedback and submitted traces via the Feedback app. We've been reviewing the traces and have identified an issue that we believe is the cause of stuttering in some of the cases that you've reported," Aaron wrote. "We have a fix in the Windows Insider build that flighted to the 'Fast' ring this week (build 16273 and above). If you are already an Insider please test it with any app or game you're having this problem with and let us know how it goes."