You might have intermittent issues saving, or copying, or attaching files using 32-bit apps which are large address aware and using the CopyFile API. Saving or copying files might intermittently fail Client: Windows 11, version 22H2 Windows 11, version 21H2.This issue will be resolved on other affected Windows versions in updates that will be released in the near term. Resolution: This issue has been addressed for devices running Windows 11, version 22H2 in updates released on June 27, 2023 ( KB5027303) and later. Note: Locking Windows will not mitigate this issue, you must sign out. Workaround: If you have attempted to view effective access, you can mitigate the CPU usage issue by restarting your device or by signing out for the affected user.

This issue is unlikely to be experienced by consumers using Windows devices in their home. On affected devices, when the 'View effective access' button is selected, you will receive the message 'Computing effective access.' but the results of the query might not be displayed and explorer.exe might continue to use CPU after the Advanced Security settings dialog is closed. Client: Windows 11, version 22H2 Windows 10, version 22H2 Windows 11, version 21H2 Windows 10, version 21H2Ĭomputing effective access might not show resultsĪfter installing updates released on or later updates, you might be unable to view Effective Access in the 'Advanced Security Settings' dialog for shared files or folders.If you are experiencing this issue with other security software installed or after installing the latest version of Trellix Endpoint Security Agent, please contact customer support of the security software you are using. Resolution: This issue has been resolved by Trellix in Endpoint Security Agent (HX) 35.31.25 and later. This issue is not likely to be encountered by consumers using Windows devices in their home. When attempting to open an affected app, Event Log indicates an access violation with the error 'module is unknown'. This issue only occurs with 32-bit apps running on 64-bit Windows with Trellix Endpoint Security version earlier than 35.31.25. Some known affected apps are Microsoft Outlook and other Microsoft Office apps. Microsoft Outlook and some apps might not openĪfter installing KB5027231 or later updates on Windows devices with certain antivirus, antimalware or security software installed, you might not be able to open Microsoft or third-party apps.

Windows 11 release date to download