The Secure Boot update failed. Unknown HResult Error code: 0x800700c1.

[movoodoo]

@Resistencia

BIOS updated:

BIOS Version: HP V72 Ver. 01.10.00, 26.08.2025

According to the manual:

https://techcommunity.microsoft.com/blog/windows-itpro-blog/updating-microsoft-secure-boot-keys/4055...

I checked if the Secure Boot DB was updated by running:

[System.Text.Encoding]::ASCII.GetString((Get-SecureBootUEFI db).bytes) -match ‘Windows UEFI CA 2023’

I got 'false'. But I should have gotten 'true'.

But I don't set the registry key and don't  run task from this manual.

[resistencia]

Did you check the BIOS version with the Device Manager firmware?

[resistencia]

You should find the file at the following link. If you do not have it, it may be because providing this record is prohibited in your country's region.

[resistencia]

If your computer starts up fine, I see no reason to touch things that could damage it, but if you wish, you can follow these steps:

How to manage the Windows Boot Manager revocations for Secure Boot changes associated with CVE-2023-...

[movoodoo]

@Resistencia

Firmware version:

[movoodoo]

@Resistencia

"If your computer starts up fine, I see no reason to touch things that could damage it, but if you wish, you can follow these steps:"

In general, I think so too. But I have doubts that Secure Boot works properly with this error.

[resistencia]

Click on driver, not on the firmware tab.

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@movoodoo wrote:

@Resistencia

Firmware version:

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[movoodoo]

@Resistencia

[resistencia]

As I imagined, Windows has not updated it. Usually, after you update the BIOS, Windows Update sends a driver that matches the BIOS version. In your case, it has not sent it, but this does not affect the fact that your BIOS complies with the UEFI certification.

So when compare windows in events, it gives that “false” certificate error.

[resistencia]

Another thing in digital signer should say “compatible with Windows UEFI.”  but windows  has not updated