Event ID 1040 (TPM-WMI) Error - Pre-attestation failure ("EkCertIsAvailable": false) after hardware upgrade

deepesh kushwaha 5 Reputation points
2026-08-15T17:38:46.0333333+00:00

Hello,

I recently upgraded my computer's motherboard and CPU, and I am now seeing a persistent error in the Windows Event Viewer (Event ID 1040, TPM-WMI).

The error message says:

"Pre-attestation health checks confirm a critical component has failed, and the device is not expected to pass attestation."

My Setup:

  • New Motherboard: MSI B550M PRO-VDH WIFI
  • New CPU: AMD Ryzen 5 5600X

What I have tried so far:

  • I did a completely clean reinstallation of Windows.
  • I checked my settings, and Secure Boot is turned ON.

The summary shows "HealthStatus": "Cannot be attested" and "EkCertIsAvailable": false. My TPM chip is active and responsive for basic windows tasks, but it is failing the attestation check due to this missing endorsement certificate block.

Could anyone guide me on how to get Windows to properly recognize or provision this missing certificate on my new hardware? Do I need to update to a specific AGESA BIOS version on this MSI motherboard to resolve the issue?

Thank you for your help!

Windows for home | Windows 11 | Security and privacy
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Answer recommended by moderator
deepesh kushwaha 5 Reputation points
2026-08-16T14:11:20.3566667+00:00

Update: I managed to completely resolve this issue by updating my MSI B550M PRO-VDH WIFI motherboard BIOS to the latest stable version (7C95v2P1). Flashing the BIOS properly updated the AGESA microcode, which fixed the missing certificate communication bug between Windows 11 and my AMD Ryzen 5 5600X CPU.

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