Windows 11 KB5074109 (January 2026 Update) is causing major issues on some PCs, and Microsoft has more details to share.

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

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 ...

Another week, another big Windows problem.

Windows 11 January 2026 updates may cause boot failures on some PCs. Microsoft is investigating issues linked to KB5074109.

Microsoft shares more details about the boot failure bug triggered by the latest Patch Tuesday update, KB5074109, in Windows ...

In confirmed cases, Windows 11 boot failure occurs post-update, with the machine stuck at a black screen and unable to ...

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

Windows 11 runs into another disastrous bug with its latest update — Microsoft admits an 'issue in which devices are failing ...

Some machines are failing to start after security updates, prompting yet another Microsoft investigation Microsoft is ...

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