Sets SerializeTimerExpiration = 1 in the kernel. Windows then processes expired timers sequentially on a single path rather than fanning them across CPUs, which some latency-tuning guides report reduces timer-related DPC jitter on desktops. Reboot required; reversible.
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-hardware/drivers/kernel/timer-objects-and-dpcs