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

After the first update stopped PCs from shutting down or going to sleep, the latest one halts the boot-up process. Microsoft ...

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

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 ...

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

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

Microsoft has started rolling out new Secure Boot certificates that will automatically install on eligible Windows 11 24H2 ...

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

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

Microsoft has had to issue two out-of-band updates to fix its buggy Windows 11 patch.