Microsoft Patch Tuesday September 2025 Release Date. What is patching and why is it important? These updates are intended to help our customers keep their computers up.

Microsoft is rolling out the september 2025 update for windows 11 with the release of builds 22631.4169 and 22621.4169 as the update kb5043076 for versions 23h2. The cumulative updates for october 2025 were released on october 8, 2025, covering various supported versions of windows.