In recent developments, users of both Windows 11 version 24H2 and Windows 10 version 22H2 are encountering a notable issue with the Task Manager, which is inaccurately displaying the number of running applications and processes. However, the situation is particularly concerning for Windows 10 users, as a newly identified bug has emerged following the installation of the KB5043131 update.
Details of the Bug
Microsoft has confirmed that after applying the September 2024 preview update (KB5043131), non-admin users may face difficulties launching certain applications. This includes widely used programs such as Quick Assist, Microsoft Teams, and Windows Narrator. The root of the problem lies in the UIAccess attribute, which is set to “true” in the manifest file of affected applications. This attribute is intended to grant higher privileges to applications, allowing them to launch from secure paths. The secure paths include:
- %ProgramFiles% (including subdirectories)
- %ProgramFiles(x86)% (including subdirectories for 64-bit versions of Windows)
- %systemroot%system32
- %systemroot%syswow64 (for 64-bit versions of Windows)
As a result, any application utilizing this attribute will fail to start when executed from a non-admin profile, creating significant inconvenience for users relying on these tools.
Mitigation Strategies
To address this issue, Microsoft has implemented the Known Issue Rollback feature, which allows for the retraction of problematic updates without requiring user intervention. However, users should be aware that this workaround may take up to 24 hours to take effect. In the meantime, a simple system restart may provide a temporary solution for those unable to launch specific applications.
For organizations managing devices, IT administrators are advised to apply a specialized policy to reverse the changes that have led to these application failures. This policy can be accessed through a designated download link provided by Microsoft. A more permanent resolution is anticipated in a forthcoming update, ensuring that users can return to their regular workflows with minimal disruption.
