Windows 11 (KB5066835, KB5066793) October 2025 Patch Tuesday out

Microsoft has released Patch Tuesday updates for Windows 11 25H2, 24H2, 23H2, and 22H2. The 25H2 and 24H2 update is provided via KB5066835, while the 23H2 and 22H2 updates are delivered via KB5066793. You will be on builds 26200.6899 on 25H2, 26100.6899 on 24H2, 22631.6060 on 23H2, and 22621.6060 on 22H2, respectively, after applying the updates.

The changelog for KB5066835 is given below:

Highlights

• This update addresses security issues for your Windows operating system.

Improvements

• [Browser] Fixed: This update addresses an issue that caused the print preview screen to stop responding in Chromium-based browsers.

• [Gaming] Fixed: An issue occurred when users signed in to a Windows device using only a Gamepad at the lock screen. If no other input methods—such as touch or fingerprint—were used during sign-in, apps and games did not respond to input afterward.

• [PowerShell]

   

  • Fixed: This update addresses an issue that affects PowerShell Remoting and Windows Remote Management (WinRM), where commands might time out after 10 minutes.

  • Fixed: This update addresses an issue that prevented an audit event from being logged.

     

• [Windows Hello] Fixed: This update addresses an issue that affects the setup process for Windows Hello face recognition when using USB infrared camera modules. Users were unable to complete setup due to a persistent error message, such as “Make sure your face is centered in the frame.”

• [Compatibility] This update removes the ltmdm64.sys driver. Fax modem hardware dependent on this specific driver will no longer work in Windows.

   

Known issues:

Symptoms

Some Digital TV and Blu-ray/DVD apps might not play protected content as expected after installing the August 29, 2025, Windows non-security preview update (KB5064081), or later updates.

Apps that use Enhanced Video Renderer with HDCP enforcement or Digital Rights Management (DRM) for digital audio might show copyright protection errors, frequent playback interruptions, unexpected stops, or black screens.

Streaming services are not affected.

Workaround

This issue is partially resolved. Problems affecting certain applications that use Enhanced Video Renderer with HDCP enforcement have been addressed in the September 2025 Windows preview update (KB5065789) and later updates.

We recommend installing the latest update for your device. It includes important improvements and fixes, including a resolution for this issue.

However, some apps that use DRM for digital audio might still experience problems.

We’re investigating a long-term solution for affected apps and will share more information when it's available.

These updates will be available from Windows Update and should install automatically in most cases. If you would like to download these updates for offline installation, you can get them from the Microsoft Catalog website. You can find the update for 24H2 here, and for 23H2/22H2 here.

Source

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Posted Wednesday 15 October 2025 at 4:55 am AEST (my time).

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