Microsoft KB articles
Official Windows update notes, documented: improvements, known issues, and how to get each update, with the KB number, OS build and release date at a glance.
197 articles
KB5071430: Out-of-Box Experience Update for Windows 11 24H2/25H2 and Windows Server 2025 (November 2025)
KB5071430 improves the OOBE process for Windows 11 version 24H2, 25H2, and Windows Server 2025. Released November 21, 2025, it installs automatically during setup when an internet connection is available.
November 20, 2025 Hotpatch KB5072753 (OS Build 26200.7093) Out-of-Band
Out-of-band hotpatch for Windows 11 Enterprise LTSC 2024, OS build 26200.7093, fixing a re-offer loop after the November 2025 security update.
KB5070312 (OS Build 22631.6276) Preview - Windows 11 23H2, November 20 2025
Optional non-security preview update for Windows 11 version 23H2, releasing November 20 2025 at OS build 22631.6276, with quality and reliability improvements.
KB5072359 (OS Build 26100.7178) Out-of-Band Update for Windows Server 2025 - November 18, 2025
Out-of-band cumulative update for Windows Server 2025, OS build 26100.7178, released November 18, 2025. Fixes a boot failure on Intel C2030 systems upgrading to Server 2025.
November 11 2025 Hotpatch KB5068966 - OS Builds 26200.7092 and 26100.7092
Hotpatch KB5068966 delivers miscellaneous security improvements to internal OS functionality for Windows 11 Enterprise LTSC 2024, releasing November 11, 2025.
KB5071959: Windows 10 Version 22H2 Out-of-Band Update (OS Build 19045.6466)
Out-of-band update for Windows 10 version 22H2 (OS Build 19045.6466), released November 11, 2025, fixing ESU enrollment wizard failures on consumer devices.
KB5068781: November 2025 Security Update for Windows 10 (OS Builds 19044.6575 and 19045.6575)
November 11, 2025 security update for Windows 10 Enterprise LTSC 2021 and Windows 10 ESU, bringing OS builds to 19044.6575 and 19045.6575.
KB5068865: Windows 11 Version 23H2 Security Update (OS Build 22631.6199) - November 2025
November 11, 2025 cumulative security update for Windows 11 version 23H2, bringing OS build to 22631.6199 with HTTP.sys parser fix and Secure Boot certificate guidance.
KB5068787: Windows Server 2022 Cumulative Update - OS Build 20348.4405 (November 2025)
KB5068787 is the November 11, 2025 security cumulative update for Windows Server 2022, bringing OS build 20348.4405 with security fixes and quality improvements.
KB5068840 Hotpatch for Windows Server 2022 Datacenter: Azure Edition (OS Build 20348.4346)
November 11, 2025 hotpatch security update for Windows Server 2022 Datacenter: Azure Edition, bringing the OS to build 20348.4346 with miscellaneous internal security improvements.
KB5068861: Windows 11 Security Update for Builds 26200.7171 and 26100.7171 (November 2025)
November 11, 2025 cumulative security update for Windows 11 versions 25H2 and 24H2, delivering OS builds 26200.7171 and 26100.7171 with security fixes and quality improvements.
KB5067036: Windows 11 Preview Update - OS Builds 26200.7019 and 26100.7019 (October 28, 2025)
Optional non-security preview update for Windows 11 versions 25H2 and 24H2, releasing OS builds 26200.7019 and 26100.7019 on October 28, 2025.
KB5067112 - Windows 11 23H2 Preview Update (OS Build 22631.6133) - October 28, 2025
Optional non-security preview update for Windows 11 version 23H2, releasing OS build 22631.6133 on October 28, 2025, with quality, compatibility, and networking fixes.
KB5070881 (OS Build 26100.6905): Windows Server 2025 Out-of-Band Update, October 23 2025
Out-of-band cumulative update for Windows Server 2025 (OS Build 26100.6905) released October 23, 2025, addressing a WSUS remote code execution vulnerability.
KB5070884 (OS Build 20348.4297): Windows Server 2022 Out-of-Band Update - October 2025
Out-of-band cumulative update for Windows Server 2022 (OS Build 20348.4297) released October 27, 2025, fixing a WSUS remote code execution vulnerability (CVE-2025-59287).
KB5070773: Windows 11 Out-of-Band Update for OS Builds 26200.6901 and 26100.6901 (October 20, 2025)
Out-of-band cumulative update for Windows 11 versions 24H2 and 25H2, fixing USB device failure in WinRE after the October 14 security update.
KB5066791 - Windows 10 Security Update (OS Builds 19044.6456 and 19045.6456) October 2025
October 14, 2025 security update for Windows 10 versions 21H2 and 22H2, bringing OS builds 19044.6456 and 19045.6456 with quality fixes and security hardening.
KB5066782: Windows Server 2022 Security Update (OS Build 20348.4294) - October 2025
October 14, 2025 cumulative security update for Windows Server 2022, bringing OS build to 20348.4294 with input, networking, and cryptography fixes.
KB5066835: Windows 11 Security Update - OS Builds 26200.6899 and 26100.6899 (October 2025)
October 14, 2025 security update for Windows 11 versions 24H2 and 25H2, delivering OS builds 26200.6899 and 26100.6899 with security fixes and quality improvements.
KB5066793: Windows 11 Security Update for Versions 22H2 and 23H2 (October 14, 2025)
KB5066793 is the October 14, 2025 cumulative security update for Windows 11 versions 22H2 and 23H2, producing OS builds 22621.6060 and 22631.6060.