For the HP EliteDesk 800 G4 Tower, first update the system to the latest BIOS available on HP support site, as Secure Boot certificate updates are often included in recent firmware releases or distributed through Windows Update. If no BIOS version specifically mentions the Microsoft Secure Boot Certificate 2023 update, contact HP Enterprise Support with the product ID and current BIOS version to confirm the recommended remediation path for this model.
HP EliteDesk 800 G4 Base Model Tower PC ,MS Secure boot Cert 2023 issue
Dear Support,
We are planning to fix MS Secure boot Cert 2023 issue in HP EliteDesk 800 G4 Base Model Tower PC ( product id: 4FW49AV)
But we can't find any BIOS Version fix this issue,
Please help to provide a solution ,
Many thanks,
Windows for home | Windows 11 | Windows update
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DaveM121 935.1K Reputation points Independent Advisor2026-06-15T11:59:01.73+00:00 Go to the support page for the PC on the HP website to check if you have installed the latest BIOS update they provide, I checked the latest they provide, it was released in 2025, also check if you have installed the firmware updates they provide.
You cannot manually update the Secure Boot Certificates yourself, that will be applied by Windows udpates automatically, Microsoft have only started releasing the updates in the May and June updates and they indicate they will continue to release the certificate updates over the next few months.
This is the information Microsoft currently provide about the Secure Boot Certificates.