How to confirm the SecureBoot Cert expire issue fixed ???

Question

Dear

Good day, we follow the MS KB to applied the Secureboot Cert issue.

May I know how to confirm it fixed by command ?

Many thanks,

Answer 1

Use the following checks, depending on which Secure Boot update was applied.

1. Verify Windows UEFI CA 2023 (new Secure Boot DB certificate)

After applying the Secure Boot DB update (for example via WinCS/TPMTasks):

1. Open PowerShell as Administrator.
2. Run:

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

3. If the command returns True, the Secure Boot DB has been updated successfully with the Windows UEFI CA 2023 certificate.

If the update was triggered via WinCS, the state can also be audited with:

WinCsFlags.exe /query --key F33E0C8E002

Expected output when applied:

• State: Enabled
• Current Configuration: F33E0C8E002
• Pending Configuration: None
• Pending Action: None

2. Verify Windows Production PCA 2011 is in DBX (revocation for CVE-2023-24932)

If the mitigation to revoke the old Windows Production PCA 2011 certificate was applied:

1. Open PowerShell as Administrator.
2. Run:

[System.Text.Encoding]::ASCII.GetString((Get-SecureBootUEFI dbx).bytes) -match 'Microsoft Windows Production PCA 2011'

3. If the command returns True, the revocation list (DBX) contains Microsoft Windows Production PCA 2011, confirming the mitigation is in place.

Additionally, after running the Secure-Boot-Update task, Event Log entry 1037 (per KB5016061) confirms the DBX update was applied.

3. Confirm Secure Boot servicing task has completed

If the update was initiated via WinCS/TPMTasks:

1. Open PowerShell as Administrator.
2. Manually trigger the task:

Start-ScheduledTask -TaskName "\Microsoft\Windows\PI\Secure-Boot-Update"

3. Restart the device two times.
4. Re-run the verification commands above (Get-SecureBootUEFI db and/or dbx) to confirm the new certificates or revocations are present.

When all of the following are true, the Secure Boot certificate/DB updates are confirmed as applied:

• Get-SecureBootUEFI db contains Windows UEFI CA 2023 (returns True).
• If applicable, Get-SecureBootUEFI dbx contains Microsoft Windows Production PCA 2011 (returns True).
• WinCsFlags.exe /query --key F33E0C8E002 shows State: Enabled and no pending configuration or action.

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References:

• Windows Configuration System (WinCS) APIs for Secure Boot
• How to manage the Windows Boot Manager revocations for Secure Boot changes associated with CVE-2023-24932
• Windows Secure Boot certificate expiration and CA updates

Answer 2

Dear Lui Lui

After applying the Secure Boot certificate fix, the easiest way to confirm things are healthy is by running a couple of quick PowerShell checks. First, you can use: Confirm-SecureBootUEFI

If it returns True, that means Secure Boot is enabled and working properly. Next, you can run: Get-SecureBootPolicy

This will show you the active Secure Boot policy in place. If the cert issue was resolved, you shouldn’t see any expired or invalid entries here. Another handy one is: Get-SecureBootUEFI

Run those commands, check for True on the first one, and make sure the policy looks clean. If everything checks out, you’re good to go

Answer 3

Good day Lui Lui

After you’ve applied the Secure Boot certificate fix from the KB article, the easiest way to confirm it’s actually in place is by checking the Secure Boot status from the command line. On Windows, you can open PowerShell (as admin) and run:

Confirm-SecureBootUEFI

If Secure Boot is enabled and healthy, that command will return True. If it comes back as False or throws an error, that means either Secure Boot isn’t enabled in BIOS/UEFI or something’s still off with the certs.

Another quick check is to run:

Get-SecureBootPolicy

That will show you the current Secure Boot policy being enforced. If the KB fix was applied correctly, you should see a valid policy listed instead of an error.

For extra peace of mind, you can also run:

systeminfo

Scroll down and look for the “Secure Boot State” line it should say On.

So in short: PowerShell’s Confirm-SecureBootUEFI is your go-to command, and pairing it with systeminfo gives you a nice double-check.

If this guidance proves helpful, feel free to click “Accept Answer” so we know we’re heading in the right direction and let me know if you need any assistance. Thank you!

Answer 4

Hello MS Support,

Good day, please help to provide some simple command to check them in powershell for confirme the Secureboot cert expired issue fixed ??

Many thanks,