Windows Secure Boot certificate expiration Important: Secure Boot certificates used by most Windows devices are set to expire starting in June 2026. This might affect the ability of certain personal and business devices to boot securely if not updated in time. To avoid disruption, we recommend reviewing the guidance and taking action to update certificates in advance. For details and ...

If you see error 0x80070426, you may have to restart your device and try again. Find more solutions here.

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Microsoft Support

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