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

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

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

Microsoft is aware of an alleged issue that leaves PCs unable to boot and requires manual recovery after Windows 11 January ...

If one of your PCs fails to boot properly -- or is stuck in an endless boot cycle -- accessing Windows and your files may seem impossible. Troubleshooting and repairing a PC that reboots constantly ...

Safe Mode is a lightweight version of the Windows operating system that you can use to troubleshoot the computer when the operating system fails to boot. However, if Safe Mode doesn't work, you must ...