Windows 11 Update KB5039304: Enhancements and Known Issues

The latest update from Microsoft for Windows 11 has arrived, set to improve both functionality and security across various devices. Released on June 28, 2024, this update is coded KB5039304, representing OS Build 26100.1000. This non-security update introduces key enhancements—particularly relevant for users targeting the Copilot+ PCs and those previously on Windows Insider 24H2 builds.

Key Highlights of Update KB5039304​

• Quality Improvements: The update addresses several non-security related issues, ensuring that your Windows operating system operates smoother and more reliably.

Improvements Included in This Update​

1. Windows Defender Application Control (WDAC) Issues:
   • Resolves problems where WDAC fails to verify the policies of certain applications.
   • Fixes an inconsistency in reporting, where some policies might appear as inactive or unauthorized.
2. Desktop Window Manager (DWM):
   • Addresses an issue that could cause DWM.exe to stop responding, enhancing the graphical performance and application stability.
3. Unified Write Filter (UWF):
   • Fixes issues with WMI API calls that were previously generating 'access denied' exceptions during shutdown or restart attempts.
4. Input Method Editor (IME):
   • Fixes an issue where the IME candidate list did not display properly, ensuring a better user experience for those entering non-Latin characters.
5. Mobile Operator Profiles:
   • Updates to the Country and Operator Settings Asset (COSA) profiles are now up-to-date to support connectivity for various mobile operators.

Known Issues Post Update​

While this update brings a variety of improvements, Microsoft has also acknowledged that players using Arm devices might encounter issues downloading and playing Roblox from the Microsoft Store. However, a workaround is available: players can directly download the game from the official Roblox website.

How to Get the Update​

To ensure you're running the latest version with these enhancements:

1. Via Windows Update:
   • Go to Settings > Update & Security > Windows Update and check for optional updates.
2. For Standalone Installations:
   • Users can visit the Microsoft Update Catalog to download a standalone package if required.
3. Windows Server Update Services (WSUS):
   • Administrators can manually import this update into WSUS.

Additional Information​

This update also includes a servicing stack update (KB5039333) that enhances the core system component responsible for installing updates, ensuring that your device can reliably receive and implement future patches from Microsoft.

Removal of Cumulative Updates​

If you find the need to revert this update, the process involves using the Deployment Image Servicing and Management (DISM) tool. Remember, running the Windows Update Standalone Installer (wusa.exe) for removing the combined package won't work because the servicing stack update (SSU) is included in the combined package.

Conclusion​

Installing KB5039304 is a vital step towards achieving a more resilient and efficient Windows 11 experience. With numerous fixes and enhancements, this update not only addresses critical application management issues, but also fortifies the overall stability of your operating system. For those invested in leveraging the latest features, staying current on updates remains essential.
So buckle up, grab that update, and enjoy a more polished Windows experience!

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For users looking to stay ahead of the curve regarding updates and security patches, following the official Windows Update account on social media platforms is a great way to be informed about the latest changes in real-time. Happy updating!
Source: Microsoft Support June 28, 2024—KB5039304 (OS Build 26100.1000) Preview - Microsoft Support