Thread by @WindowsUpdate

The October 2025 Windows security update is now available for Windows 10

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Windows 10 release notes:
•Versions 21H2, 22H2 (KB5066791): support.microsoft.com/help/5066791
•Version 1809 (KB5066586): support.microsoft.com/help/5066586
•Version 1607; Windows Server 2016 (KB5066836): support.microsoft.com/help/5066836
•Version 1507 (KB5066837): support.microsoft.com/help/5066837

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Highlights for Windows 10, version 22H2:
•This update addresses security issues for your Windows operating system.

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The update includes improvements that were part of KB5066198 (released on September 25)


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https://x.com/WindowsUpdate/status/1971321939038756880

Please refer to the Microsoft Security Update Guide for information on security vulnerabilities:  

(🧵5/9)msft.it/6019eSFN1

Today, October 14, 2025, Windows 10 has reached end of support. The October 2025 security update is the final update available for the last supported versions: Windows 10, version 22H2 (Home, Pro, Enterprise, Education, and IoT Enterprise editions), Windows 10 2015 LTSB, and Windows 10 IoT Enterprise LTSB 2015.

Devices running these versions will no longer receive monthly security and preview updates containing protections from the latest security threats.

learn.microsoft.com/en-us/lifecycl…

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The Windows 10 Extended Security Updates (ESU) program allows organizations to receive critical and important security updates for PCs enrolled in the paid subscription service.



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Additionally, customers can enroll their personal Windows 10 PCs in the Windows 10 Consumer Extended Security Updates (ESU) program to receive critical and important monthly security updates.



(🧵8/9)microsoft.com/en-US/windows/…

Resources 
•Learn about the different types of monthly updates: msft.it/6017eRKoX 
•Find resources, tools, and news about known issues and safeguards: msft.it/6016eRKon 
•Have an issue? File feedback to our engineers: msft.it/6018eRKok  

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