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SecurityBleepingComputer44 minutes ago

Windows Server 2016 update triggers 0xc0000409 errors

1 min read

Microsoft's August 2026 security update can trigger 0xc0000409 errors on Windows Server 2016 systems with the Compatibility Appraiser diagnostic service enabled. The error halts startup or causes crashes, requiring affected administrators to disable the service or apply a workaround.

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