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

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

Round and round we go.

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 ...

Microsoft issues second emergency patch for Windows this month - update your PC today ...

Microsoft says uninstall Windows 11 update KB5074109 to fix Outlook Classic hangs, black screens and other stability issues ...

Microsoft's January 2026 Patch Tuesday update – already notorious for causing serious issues – is now being blamed for slowing down Nvidia graphics cards. While Nvidia ...

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 ...

According to reports from Microsoft and Windows Latest, the latest update, identified as KB5074109, has caused some Windows devices to fail to boot entirely. Users encountering this problem will see a ...

Microsoft has released a second emergency Windows 11 update, KB5078127, to fix Outlook crashes, cloud file errors, and other ...