How to check your Windows PC for expiring security certificates - a big one is ending soon ...
Microsoft confirms systems without updated Secure Boot certificates will boot normally but lose some security protections.
In June 2025, Microsoft announced that, in June 2026, it would begin deprecating Secure Boot certificates of Windows systems from 2011, which were superseded by their 2023 counterparts.
TL;DR: Secure Boot certificates in Windows 10 and 11 will expire by June 2026, risking system security and compatibility. Microsoft is issuing new certificates through updates and OEM firmware ...
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