The November 2026 Windows security update is now available

The November 2026 security update is now available for all supported versions of Windows. We recommend that you install these updates promptly. For more information about the contents of this update, see the release notes, which are accessible from the Windows 11 update history page. To learn more about the different types of monthly quality updates, see Understanding Windows monthly updates.

Highlights for the Windows 11, version 26H2 update

• This security update includes improvements that were part of update KB5127648 (released October 13, 2026).
• This update provides security improvements to help protect Windows devices against the latest threats.
• Secure Boot certificate deployment expands to more eligible devices through additional high-confidence device targeting data.
• This update fixes an issue that prevented some USB Audio 1.0 devices from starting and displayed error code 10 in Device Manager.

Short on time? Watch the Windows 11 release notes video for this month’s tips.

For instructions on how to install this update, see the KB article for your operating system listed below:

• Windows 11, versions 26H2, 25H2, and 24H2: KB5132061
• Windows 11, version 26H1: KB5132059
• Windows 11, version 23H2: KB5131087
• Windows 11 Enterprise LTSC 2024: Hotpatch KB5132043
• Windows 10, versions 22H2 and 21H2: KB5131096
• Windows 10 Enterprise LTSC 2019 and Windows Server 2019: KB5131085
• Windows Server 2016: KB5131291
• Windows Server 2025: KB5131080
• Windows Server 2025 Datacenter: Azure Edition: Hotpatch KB5131077
• Windows Server 2022: KB5131090
• Windows Server 2022 Datacenter: Azure Edition: Baseline KB5131090

Note: As part of the November 2026 Windows security release, standalone security updates are available for devices enrolled in hotpatch updates. These updates address security vulnerabilities in Windows PowerShell involving web requests, PowerShell workflows, and the Desired State Configuration (DSC) Archive Resource. They are offered after the November 2026 hotpatch update is installed. A restart might be required after installing these updates if any of the updated files are in use. For more information, see the applicable KB article:

• Windows 11, versions 26H2, 25H2, and 24H2: KB5135385
• Windows Server 2025: KB5135386

IMPORTANT: Because of minimal operations during the Western holidays and the upcoming new year, there will be no December 2026 non-security preview update in the second part of the month. Normal monthly servicing for both security and non-security preview updates will resume in January 2027.