Note: This issue does not affect USB cameras or webcams, even when attached to an affected Windows devices. Affected devices use these processors: Qualcomm 8cx Gen 1, Qualcomm 8cx Gen 2, Microsoft SQ1, and Microsoft SQ2. When encountering this issue, you might receive an “0xA00F4271 (0x80004005)” error when attempting to use the Camera app. Windows devices using certain Arm-based processors might have issues using integrated cameras starting on May 23, 2023. Integrated camera might not work as expected on some Arm-based devices

Client: Windows 11, version 22H2 Windows 10, version 22H2 Windows 11, version 21H2 Windows 10, version 21H2.

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 KB5027215 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.

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