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

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

Microsoft has linked recent reports of Windows 11 boot failures after installing the January 2026 updates to previously ...

The most recent January Windows Update is broken on a number of PCs, but at least virtual machines don't seem to be impacted.

Struggling with Windows 11 Fast Startup and Hibernate errors? Discover proven fixes to resolve boot issues, freezing, and ...