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‎04-23-2026 12:27 PM

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We seem to have some EliteDesk 800 G6 desktops running Windows 11 25H2 which won't boot using Secure Boot after the April 2026 Microsoft Windows updates.  At startup, the BIOS displays "Selected boot image did not authenticate."  On the HP support page for this desktop model, there is a notification about this and a link to this article: HP Commercial Products - Commercial Products (2017-2023) with Sure Start May Experience a Secure Boo....  We followed the recovery steps provided but we are unable to get the desktop to boot to Windows 11 using Secure Boot.  It appears that the option to Reset Secure Boot keys to factory defaults does not work.  

Has anyone else come across this or have suggestions on how to restore the Secure Boot functionality?

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