Sets Scheduling Category = High on the built-in 'Games' Multimedia Class Scheduler task. Threads that join the Games task (most DXGI games do automatically) are scheduled in the High MMCSS class, giving them a firmer CPU guarantee under load. Companion to the built-in Games Priority (6) and GPU Priority (8) tweaks. Reversible; auto-snapshots the prior value.
MaxTweaks applies this tweak with one click and snapshots your original setting first, so you can revert it cleanly at any time. A System Restore point is offered before batch changes, and every tweak links to its official source.
Get MaxTweaksOfficial documentation: https://learn.microsoft.com/en-us/windows/win32/procthread/multimedia-class-scheduler-service