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Vulnerabilities & PatchesEmerging1 sourceSep 8, 2026 · 15:22via BleepingComputer

August updates trigger 0xc0000409 errors on Windows Server 2016

Brief

Microsoft says the August 2026 security update may trigger 0xc0000409 errors on Windows Server 2016 systems where the Compatibility Appraiser diagnostic service is enabled. [... ]

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Vulnerabilities & PatchesMicrosoft