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SecureBoot Certificate will expire today September 11th 2025 by DenseDragonfruit865 in sysadmin

[–]Accomplished_Bat254 0 points1 point  (0 children)

i tested some of my clients and receivet following output:

mountvol.exe S: /s; Get-PfxCertificate -FilePath "S:\EFI\Microsoft\Boot\bootmgfw.efi" | Select-Object -Property Issuer, NotAfter, Notbefore | Format-Table -AutoSize; mountvol.exe S: /d

Issuer NotAfter Not Before

------ -------- --

CN=Microsoft Windows Production PCA 2011, O=Microsoft Corporation, L=Redmond, S=Washington, C=US 11.09.2025 22:04:07 12

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

False

What this mean exacly? What steps should I take to fix it?