https://www.pcgamer.com/latest-windows-10-update-stops-future-updates-interrupting-your-game/

Windows 10 received its October update yesterday, adding several new features to the OS. Most notably, it made DirectX Raytracing available to all users.

Amongst these larger changes, as noted by ONMSFT, however, are several improvements to Windows 10’s Game Mode. One of these provides the option for the system to switch off Windows Updates automatically, letting the system prioritise running games, and also stopping the system pestering you about impending updates while you’re playing.