Windows 11’s Secure Boot 2023 updates are failing across some PCs, exposing a wider firmware problem
Microsoft’s CA-2023 Secure Boot update broke PCs. Learn why UEFI firmware failed, how vendors reacted, and how to fix your boot issues.
Windows 11 now shows Secure Boot certificate status in Windows Security. Learn what the new alerts mean and what actions you ...
The boot issue, which Microsoft previously investigated and linked to failed December 2025 updates, affected a limited number of commercial Windows 11 devices running versions 25H2 and 24H2.
Microsoft has linked recent reports of Windows 11 boot failures after installing the January 2026 updates to previously failed attempts to install the December 2025 security update, which left systems ...
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