New Windows 11 25H2 October 2025 Update – New Features in the Main Release (Build 26200.6899 or KB5066835)

In this article, we will talk about the latest Windows 11 Update for the 25H2 Main Release, which is the Build 26200.6899 or KB5066835.

For those of you who are not familiar with how Windows 11 Updates for the Main Release work, I will explain it to you in the following lines.

Every month Windows 11 has a B and a C Release for Windows 11. Usually, the B Release is launched on the second Tuesday of the month and contains all the features that were tested in the previous month’s C Release.

New Improvements in this Update

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

For an in-depth list of other features and fixes that are rolling out, you can check this article.

Windows 11 Servicing Stack Update – 26100.6893

This update makes quality improvements to the servicing stack, which is the component that installs Windows updates. Servicing stack updates (SSU) ensure that you have a robust and reliable servicing stack so that your devices can receive and install Microsoft updates. 

For more info about this Update, you can check this article from the Microsoft Blog.

For a more in-depth presentation of the New Update, you can watch the video below from the YouTube channel.