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.

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

Another week, another big Windows problem.

A Windows security update bug has prevented some Windows 11 24H2 and 25H2 users from booting into their PCs, requiring them ...

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

Microsoft is investigating reports of serious boot failures affecting Windows 11 devices following the January 2026 security ...

If you get the “Couldn’t find a bootable operating system” error while turning on your Surface laptop, use these fixes to resolve this error. Check if your SSD ...

Struggling with GPT disk errors during Windows 11 installation? Discover proven, step-by-step fixes to resolve this common ...