Windows Report

KB5074109 Update Causes Boot Failures on Windows 11 Devices

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

Microsoft confirms that a stack of bad Windows updates is causing boot issues

It's not just January's one.

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 ...
Windows Latest

Microsoft confirms Windows 11 KB5074109 January update BSOD, boot issues on some PCs (commerical)

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

'Devices are failing to boot': Why the latest Windows 11 bug could cause Microsoft more grief

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

Windows PCs ‘Suddenly’ Fail After Microsoft’s New Update

This comes just hours after reports that another emergency update has been issued by Microsoft to affect other problems ...

Some PCs are failing to boot after this month's Windows Update

Another week, another big Windows problem.

Windows 11 appears to have a boot failure bug that's caused by an update failure bug, creating a circle of, err, bugs

Round and round we go.

Microsoft confirms more Windows PCs cannot shut down after recent updates

Remember that Windows bug preventing PCs from shutting down or hibernating? It affects more devices than we initially thought ...
Bleeping Computer

New Windows updates replace expiring Secure Boot certificates

Microsoft has started automatically replacing expiring Secure Boot certificates on eligible Windows 11 24H2 and 25H2 systems. Secure Boot is a security feature that blocks malicious software (like ...