Recently updated my Win10 Pro installation, just kept running Windows Update until it had no more updates for me, so I'm assuming I have the latest patches or whatever. System info says that I'm running version 1607, with build 14393.1198 (which, a quick Google search shows, was released on May 9th, 2017!)
Played Overwatch for about an hour tonight, and while I was playing, everything else was fine. Chrome was fine, Skype was fine, there was no issue that I could see. But after I closed Overwatch, everything just went to shit. Typing in any program would take like 5 seconds to appear, windows were freezing and stuttering, just...everything, every single program including Explorer, was going insanely slow.
After two minutes it cleared up, but still, rather worrying. People have said that the "Game" mode causes this, but...I don't have any setting for that:
https://puu.sh/vPiqZ/05da3cc9b5.png
This only started happening today, after I ran Windows Update. I hadn't updated since about 14 months ago, so I had a ton of updates to go through. Never happened before the update, so I'm assuming it's something wrong with the newer Win10 version.