Windows 11 KB5086672 is now rolling out as an optional update with several notable improvements after March 2026 update ...
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.
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.
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