Sets AdditionalCriticalWorkerThreads = 8 under Session Manager\Executive. The critical worker pool processes ExQueueWorkItem callbacks from drivers — completion routines for storage, USB, network, and the file system. The default pool is conservative; on modern many-core CPUs that completion path becomes the bottleneck under heavy parallel I/O. Adding 8 critical workers raises the ceiling on simultaneous completion work, smoothing out bursty I/O. Each thread is a small fixed-size kernel allocation; cost is trivial. Reboot required.
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/ddi/wdm/nf-wdm-exqueueworkitem