This article highlights the issues that older computer systems will encounter when the Secure Boot Certificate expires ...
Update Release Date: The Secure Boot 2023 certificate update was deployed by Microsoft on June 24, 2026, aligning with a key expiration date. Secure Boot Function: Secure Boot relies on firmware ...
Use the following fixes if you have accidentally turned off your PC during a BIOS update: Clear CMOS Wait for the Automatic BIOS Recovery process Try to recover BIOS using a USB Flash the BIOS Contact ...
Certificate Expiration: The KEK CA 2011 certificate expired on June 24, 2026, stopping unpatched systems from receiving new Secure Boot revocations. Trust Chain Preservation: The update replaces 2011 ...
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