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
KB5075904: February 10, 2026 Security Update for Windows Server 2019 and Windows 10 LTSC 2019 (OS Build 17763.8389)
February 10, 2026 security update for Windows Server 2019 and Windows 10 Enterprise LTSC 2019, bringing OS build 17763.8389 with font, security, folder, and graphics fixes.
KB5075999 - Windows Server 2016 / Windows 10 LTSB 2016 Security Update (February 2026)
February 10, 2026 security update for Windows Server 2016 and Windows 10 LTSB 2016, delivering OS build 14393.8868 with a GPU stability fix.
KB5075941: Windows 11 Version 23H2 Cumulative Update (OS Build 22631.6649) - February 2026
February 10, 2026 security cumulative update for Windows 11 version 23H2, delivering OS Build 22631.6649 with security fixes, graphics and File Explorer repairs, and a Secure Boot certificate update.
KB5077179 - Windows 11 Version 26H1 Cumulative Update (OS Build 28000.1575)
February 10, 2026 security cumulative update for Windows 11 version 26H1, delivering OS build 28000.1575 with graphics, networking, and reliability fixes.
February 10, 2026 - KB5075912 (OS Builds 19045.6937 and 19044.6937)
Monthly security update for Windows 10 version 22H2 and 21H2 LTSC, releasing OS builds 19045.6937 and 19044.6937 on February 10, 2026.
KB5077181: Windows 11 Cumulative Security Update - February 10, 2026 (OS Builds 26200.7840 and 26100.7840)
February 2026 cumulative security update for Windows 11 versions 25H2 and 24H2, delivering OS builds 26200.7840 and 26100.7840 with security fixes and quality improvements.
KB5075906: Windows Server 2022 Cumulative Update - February 10, 2026 (OS Build 20348.4773)
February 2026 security cumulative update for Windows Server 2022, bringing OS build 20348.4773 with security fixes, quality improvements, and a new DNS feature.
February 10, 2026 Hotpatch KB5077212 (OS Builds 26200.7781 and 26100.7781)
Hotpatch KB5077212 delivers miscellaneous security improvements to internal OS functionality for Windows 11 Enterprise LTSC 2024, released February 10, 2026.
KB5075899 (OS Build 26100.32370) - Windows Server 2025 February 2026 Security Update
February 10, 2026 cumulative security update for Windows Server 2025, bringing OS build 26100.32370 with bug fixes, networking enhancements, and a bundled servicing stack update.
KB5074105: Windows 11 Preview Update - OS Builds 26200.7705 and 26100.7705 (January 2026)
Optional non-security preview update for Windows 11 versions 25H2 and 24H2, releasing January 29, 2026, with quality improvements, new features, and bug fixes.
KB5078167: Windows 11 25H2 and 24H2 January 24, 2026 Hotpatch Out-of-Band (OS Builds 26200.7634 and 26100.7634)
Out-of-band hotpatch for Windows 11 25H2 and 24H2 released January 24, 2026, fixing Remote Desktop failures and cloud file system errors.
KB5078127: Windows 11 Out-of-Band Update (OS Builds 26200.7628 and 26100.7628) - January 24, 2026
Out-of-band cumulative update for Windows 11 versions 25H2 and 24H2, released January 24, 2026, fixing a file system issue causing app hangs with cloud storage.
KB5078132 (OS Build 22631.6495): Windows 11 23H2 Out-of-Band Update, January 24, 2026
Out-of-band cumulative update for Windows 11 version 23H2, build 22631.6495, released January 24, 2026, fixing cloud storage file access issues introduced by the January 2026 security update.
KB5078135 (OS Build 26100.32236) Out-of-Band Update for Windows Server 2025 - January 24, 2026
Out-of-band cumulative update for Windows Server 2025, releasing build 26100.32236 on January 24, 2026, to fix cloud-storage file access failures introduced by the January 13 update.
KB5078136 (OS Build 20348.4651) Out-of-Band Update for Windows Server 2022 - January 24, 2026
Out-of-band cumulative update for Windows Server 2022 (build 20348.4651) released January 24, 2026, fixing a file-system bug that caused apps to hang with cloud storage.
KB5077795 (OS Build 17763.8280) Out-of-Band Update for Windows 10 LTSC 2019 and Server 2019
Out-of-band update released January 17, 2026, for Windows 10 Enterprise LTSC 2019 and Windows Server 2019, fixing Remote Desktop sign-in failures at OS build 17763.8280.
KB5077796: Windows 10 Out-of-Band Update (OS Builds 19045.6811 and 19044.6811) - January 17, 2026
Out-of-band update for Windows 10 ESU and Enterprise LTSC 2021 fixing Remote Desktop sign-in failures. Released January 17, 2026, reaching build 19045.6811 and 19044.6811.
KB5077797 Out-of-Band Update for Windows 11 23H2 (OS Build 22631.6494)
Out-of-band cumulative update for Windows 11 version 23H2, released January 17, 2026, fixing Remote Desktop sign-in failures and power/hibernate restart issues.
KB5077793 - Windows Server 2025 Out-of-Band Update (OS Build 26100.32234)
Out-of-band cumulative update for Windows Server 2025 released January 17, 2026, fixing Remote Desktop sign-in failures introduced by the January 2026 security update.
KB5077744: Windows 11 Out-of-Band Update (OS Builds 26200.7627 and 26100.7627) - January 17, 2026
Out-of-band cumulative update for Windows 11 versions 25H2 and 24H2, released January 17, 2026, fixing Remote Desktop sign-in failures introduced by the January 2026 security update.