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Close-up of an AT motherboard showing the socketed BIOS chip and real-time clock, the low-level firmware where Secure Boot certificates live.

Security·just now

Secure Boot's 2011-era keys start expiring, cutting off boot updates on unpatched PCs

Microsoft's 2011 Secure Boot certificates started expiring in June 2026. Here's what breaks on Windows and Linux, and the one update that fixes it.