Yeah, I've browsed 10-20 different websites looking for an answer, the Reddit thread I found held some promise, but it's died off a bit because there was an update on Aug 31st that allegedly fixed...

https://www.google.com/?ion=1&espv=2#q=windows%2010%20anniversary%20update

If you updated several weeks ago then you have Anniversary Update (AU) version of Windows 10. This stutterfest is a bug...

Problem is you're running Windows 10 and you've installed the Anniversary Update (Windows 10 Home 64-bit (10.0, Build 14393) (14393.rs1_release_inmarket.160819-1924)), which introduced a lovely bug...