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WU_E_PT_SECURITY_VERIFICATION_FAILURE
WU_E_PT_SECURITY_VERIFICATION_FAILURE means that Windows Update could not complete authorization with the update service. Treat it as a security or authentication failure, not as proof that a downloaded update is corrupt.
What to verify
- Confirm the client clock, time zone, and certificate-validation path are correct before changing update components.
- Identify the actual update source: Microsoft Update, WSUS, or another managed service. The remedy depends on that route.
- For WSUS, inspect proxy and TLS interception rules, and check the server-side logs for the same request time.
Microsoft: WUA networking error codes
Microsoft: Windows Update troubleshooting
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