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 ...
Windows 11 January 2026 updates may cause boot failures on some PCs. Microsoft is investigating issues linked to KB5074109.
Windows 11 KB5074109 (January 2026 Update) is causing major issues on some PCs, and Microsoft has more details to share.
XDA Developers on MSN
Microsoft confirms that a stack of bad Windows updates is causing boot issues
It's not just January's one.
Microsoft has made Windows 11 available for all users. Windows 10 users can upgrade their computers to Windows 11 for free, provided their computers meet the hardware requirements. One of these ...
Microsoft is investigating reports that some Windows 11 devices are failing to boot with "UNMOUNTABLE_BOOT_VOLUME" errors ...
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