This out-of-band (OOB) update for Windows 11, version 25H2 and Windows 11, version 24H2 (KB5129195) is cumulative. It includes updates from previous releases, along with additional security and non-security improvements. Visit the Windows release health dashboard for the latest status on this release. Improvements This OOB update includes the following improvement: [Security] This update ...

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Original publish date: August 14, 2026 KB ID: 5121772 Introduction Windows helps keep your device secure and reliable by downloading and installing updates automatically. Some of these updates need your device to restart before installation can finish. In the past, different types of updates could each ask you to restart at different times during the month — which meant more interruptions ...

This out-of-band update for Windows 11, version 23H2 (KB5129242) is cumulative. It includes updates from previous security releases, along with additional improvements. Visit the Windows release health dashboard for the latest status on this release. Announcements and messages This section provides key notifications related to this release, including announcements, change logs, and end-of ...

This cumulative update for Windows 11, version 26H1 (KB5121000) includes the latest security fixes and improvements, along with non-security updates from last month's optional preview release. Visit the Windows release health dashboard for the latest status on this release. Announcements and messages This section provides key notifications related to this release, including announcements ...

This out-of-band (OOB) update for Windows Server 2025 (KB5129235) is a non-security cumulative update. Improvements This out-of-band update contains quality improvements from KB5122871 (released September 8, 2026). The following summary outlines key issues addressed by this out-of-band update. The bold text within the brackets indicates the item or area of the change. [Remote Desktop Services ...

This cumulative update for Windows 11, version 26H1 (KB5120996), includes production-quality improvements. Announcements and messages This section provides key notifications related to this release, including announcements, change logs, and end-of-support notices. Change log