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 failed attempts to install the December 2025 security update, which left systems ...

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

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

PCs are now failing to start. Just when you thought it was safe to update your PC and get back to work, there’s another warning about January’s mandatory security update. You’ll know if you’re ...

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

Another week, another big Windows problem.

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

Round and round we go.

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 ...

Microsoft has posted an online bulletin confirming that the company is investigating reports that state Windows 11's latest security update has rendered some PCs unbootable.