ERROR_SECUREBOOT_POLICY_PUBLISHER_NOT_FOUND: meaning and diagnosis

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: The new Secure Boot policy does not include the current policy publisher in the publishers allowed to perform the update.

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ERROR_SECUREBOOT_INVALID_POLICY	ERROR_SECUREBOOT_POLICY_NOT_SIGNED

ERROR_SECUREBOOT_POLICY_PUBLISHER_NOT_FOUND

ERROR_SECUREBOOT_POLICY_PUBLISHER_NOT_FOUND (LRESULT 0x00001147) This Win32 error means the new Secure Boot policy does not list the publisher required to update the current policy.

What to check

Treat this as a policy-lineage problem, not as a generic signature failure.
Confirm that the update package was built for the currently installed policy publisher and version.
Obtain the correct policy update from the policy owner or OEM rather than trying to bypass the publisher check.

Read-only checks

Get-SecureBootPolicy | Format-List

This usually indicates that the update package belongs to a different policy lineage. Identify the publisher of the active policy and compare it with the publishers permitted by the new package before attempting another deployment.

Microsoft: Get-SecureBootPolicy

Microsoft: Set-SecureBootUEFI

Microsoft: Secure Boot

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