It's not just January's one.

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

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

The post Windows 11 boot issues tied to bad December update appeared first on Android Headlines.

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 that some Windows 11 devices are failing to boot with "UNMOUNTABLE_BOOT_VOLUME" errors ...

In a surprising turn of events, Microsoft has confirmed that its January 2026 security update, KB5074109, is causing significant boot issues for some Windows 11 users. This latest development ...

The January update for Windows 11 has been met with considerable backlash, primarily due to reports of PCs refusing to shut down and displaying critical errors. A particularly alarming issue is the ...

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.

Microsoft issues second emergency patch for Windows this month - update your PC today ...