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 ...
Tom's Hardware on MSN

Some PCs can't boot after latest Windows 11 security update, no fix in sight — mostly affects 24H2 and 25H2 versions

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

Microsoft suspects some PCs might not boot after Windows 11 January 2026 Update (KB5074109)

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

New Windows 11 PC? Confirm this special security protection is active

Windows Security is not the same across Windows 10 and Windows 11. Microsoft’s built-in security suite protects against online and offline threats in both operating systems, but Windows 11 gets extra ...