Microsoft investigates Windows 11 boot failures after January updates

Microsoft is investigating reports that some Windows 11 devices are failing to boot with "UNMOUNTABLE_BOOT_VOLUME" errors ...

Microsoft links Windows 11 boot failures to failed December 2025 update

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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Your Windows PC needs this patch to ward off nasty bootkit malware - update now

Secure Boot protects your PC against bootkit malware. The Windows update refreshes expiring Secure Boot certificates. To install, head to Settings and select Windows Update. I typically advise Windows ...
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Today is the monthly 'Windows Update' day, with patches for Windows 11 and Windows 10, and automatic updates for expired Secure Boot certificates.

The monthly Windows Update, which delivers security updates and bug fixes for Windows, has been released. The Windows Update released on January 14, 2026 (Japan time) includes five 'Critical' updates ...