Windows 10 has a “Game Mode” that Microsoft says will optimize your PC for play. Except it doesn’t always do that. Sometimes, this feature will *cause* lag or other performance problems with your high-end video games.
So if you’ve had any glitches with your gaming, and driver updates & upgrades haven’t helped, turn this option off and you may notice an immediate change.
You’ll find it under Start -> Settings -> Gaming -> Game Mode -> On/Off.