Microsoft Releases KB5039304 Update for Windows 11

TapTechNews June 21st, Microsoft today released the KB5039304 update for Windows 11 to members of the Windows Insider program in the Release Preview channel. The installed version number is upgraded to Build 26100.994.

TapTechNews learned that this update mainly focuses on bug fixes, mainly revolving around the Windows Defender Application Control (Windows Defender Application Control, WDAC), which is a feature introduced in Windows 10. It allows organizations to set a series of policies to control 'which drivers and applications can run in the system'.

The specific fixes are as follows:

This update addresses the issue affecting Windows Defender Application Control (WDAC). It fails to validate the policies of certain applications.

This update resolves the problem that Windows Defender Application Control reports a certain type of policy as 'inactive' or 'unauthorized'.

This update resolves the issue that may cause DWM.exe to stop responding.

This update updates the Country and Operator Settings Asset (COSA) profiles for some mobile operators.

This update resolves the issue affecting the Unified Write Filter (UWF). When calling through the Windows Management Instrumentation (WMI) API to shut down or restart the system, an access denied exception is triggered.

This update resolves the root cause of certain animation (frame dropping) stuttering problems that are considered to have been recently noticed by some insiders, especially in the Task View.