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

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.

Microsoft released unplanned updates over the weekend. They correct errors in the January patches and bring new boot certificates.

Struggling with the dreaded "Inaccessible Boot Device" error on your NVMe drive in Windows 11? Discover proven, step-by-step ...

Windowsのエラーで0xc00021aが表示されたら、どう解決すればいいか？Tenorshare社は2023年2月6日(月)にWindows Boot Genius V1.0.7をリリースしました。4DDiG Windows Boot Geniusを使用すると、Windowsのエラーを簡単に修正できます。 「0xc00021aというエラーが出るのはなぜなのか？

Microsoft is aware of an alleged issue that leaves PCs unable to boot and requires manual recovery after Windows 11 January ...

Struggling with the frustrating "A Disk Read Error Occurred" on Windows 11? Discover proven, step-by-step fixes to restore ...