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5.4

Microsoft August 2026 update causes 0xc0000409 errors on Windows Server 2016

Microsoft's August 2026 security update is causing 0xc0000409 errors on Windows Server 2016 systems with the Compatibility Appraiser diagnostic service enabled. The issue affects enterprise environments, potentially disrupting operations. Microsoft has not yet provided a fix, leaving administrators to mitigate manually.

BleepingComputerabout 22 hours agoengCredibility 46%View source

Score Breakdown

Mosaic Score5.4
Confidence0.9
Significance0.5
Source credibility0.5
Source

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