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.

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

Microsoft is investigating reports that some Windows 11 devices are failing to boot with "UNMOUNTABLE_BOOT_VOLUME" errors ...

The residual charge in capacitors can cause boot issues with computers sometimes. You can drain this residual charge by performing the hard reset. The steps to do this are as follows: Turn off your ...

Is your PC not booting after updating BIOS? Some users have reported that they can’t boot their computers right after installing a BIOS update. While the issue is likely to occur due to a failed BIOS ...

It's not just January's one.

Another week, another big Windows problem.

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 ...

For some reason lately my computer has been having very much trouble when booting up after sitting off for a couple hours. Once the computer is up and running, everything is perfectly fine, but ...

A computer that refuses to start is one of the most frustrating technical problems, whether it's a desktop PC or a laptop. This issue can arise from simple power interruptions, loose connections, or ...