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

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

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

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

Frustratingly common for PC users, boot problems can stem from a variety of software and hardware glitches. A particularly frequent issue is when a Windows computer ...

Hi all,<BR>I never really bothered to dual boot windows before, but since I got Win 7 Ultimate from attended the Philly dev conference 3 weeks ago, I figured it was about time to get it up and running ...

Blue screen on Vista boot -- try starting in safe mode If you are experiencing an issue where Windows Vista boots into a blue screen (failing to properly startup) after installing the updated Boot ...

The easiest way to fix most of the problems in Windows 11/10 PC is to RESTART THE PC! It is also the first question asked by any person from who you seek technical help. Have you tried restarting the ...