Do you see Event ID 1796 in your Windows 11/10/Server logs? If the Secure update process cannot complete and fails with an error message— The Secure Boot update ...
Some users have complained about this problem that when they start their computer, it doesn’t boot. Instead, a Default Boot Device Missing or Boot Failed blue ...
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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