SecurityOct 17, 2026

Windows 11’s last Secure Boot deadline hits Monday, Microsoft reveals what happens to your PC

The certificate that signs the Windows boot loader is the last 2011 Secure Boot certificate to expire. We explain what Windows UEFI CA 2023 replaces, what each Windows Security message means, why some older PCs are stuck and how Microsoft is still pushing the update after June. The post Windows 11’s last Secure Boot d…

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