Some Windows 11 Secure Boot certificate errors, including BitLocker recovery loops and stuck KEK updates, remain unresolved ...
Microsoft has confirmed that Secure Boot certificate updates are failing or being blocked on some Windows 11 PCs.
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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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