kb5065431

About this tag
KB5065431 is the September 2025 cumulative update for Windows 11 versions 23H2 and 22H2, bringing OS builds 22631.5909 and 22621.5909. This Patch Tuesday release includes security fixes, quality improvements, and a servicing stack update (SSU). It addresses regressions in NDI streaming, UAC/Installer behavior, and SMB handling. The update also includes Copilot reliability updates and fixes for OOBE translation bugs. Home and Pro editions of Windows 11 23H2 will reach end of updates on November 11, 2025, making this one of the final monthly rollups for that version. Microsoft reports no known issues with KB5065431 at publication.

  1. Windows 11 23H2 KB5065431 Sep 2025 Update: NDI, UAC, SMB Fixes

    Microsoft has pushed the September 2025 cumulative for Windows 11 version 23H2 — KB5065431 (OS build 22631.5909) — and the update is available both through Windows Update and as an offline .msu installer from the Microsoft Update Catalog. This release is a targeted quality-and-security rollup...
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    • 23h2 24h2 update august 2025 deployment end of updates enterprise and education home pro kb5065431 microsoft update catalog ndi-streaming offline installation smb auditing smb hardening ssu-lcu uac prompts windows 11 windows installation windows update wsus-sccm
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    • Forum: Windows News

  2. Windows 11 September 2025 Patch Tuesday: Copilot quirks, OOBE translation bug, rollout tips

    Microsoft pushed the September 2025 Patch Tuesday rollup to Windows 11 today, a cumulative release that—according to community reporting—carries the usual mix of security fixes, quality improvements and targeted Copilot reliability updates, but also surfaces a handful of user-facing regressions...
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    • august 2025 copilot cumulative update enterprise it kb5065426 kb5065431 known issues lcu multi-monitor oem imaging oobe patch release health rollback rollout servicing stack update ssu wallpaper windows 11
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    • Forum: Windows News

  3. Windows 11 September 2025 Patch: KB5065431 SSU+LCU for 22621/22631

    Microsoft released a cumulative security update today for Windows 11’s servicing branches 22621 and 22631 — published as KB5065431 (OS Builds 22621.5909 and 22631.5909) — that combines a Latest Cumulative Update (LCU) with a servicing‑stack update (SSU) and carries a set of security and quality...
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    • 22621-5909 22631-5909 auditing dism-removal enterprise it extended security updates file server kb5065431 lcu msi repair offlineimage patch rollback rollout secure boot servicing stack update smb hardening ssu ssu-lcu windows 11
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    • Forum: Windows News