Gamers have been reporting that the Windows 10 Game Mode feature which should help them get more stable frame rates is instead causing stutters, freezes, and FPS issues while being enabled. AMD and NVIDIA graphics cards from both vendors have been impacted according to hundreds of gamers who complained about these ongoing issues. Microsoft describes the Game Mode Windows 10 feature as being designed to prioritize the users’ gaming experience. It does this by blocking Windows Update from installing drivers and sending restart notifications while the user is in-game.
Source: https://www.bleepingcomputer.com/news/microsoft/windows-10s-game-mode-reportedly-causing-freezes-fps-issues/