Windows 11’s latest update drama: KB5074109 breaks things, and the uninstall process breaks too.

A Windows security update bug has prevented some Windows 11 24H2 and 25H2 users from booting into their PCs, requiring them ...

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

IT之家 1 月 21 日消息，科技媒体 Windows Latest 今天（1 月 21 日）发布博文， 指出适用于 Windows 11 的 2026 年首个累积更新 KB5074109 存在严重 BUG ，出现黑屏、经典版 Outlook 崩溃、文件资源管理器 desktop.ini 异常在内的一系列问题。

Microsoft has released another emergency Windows 11 update after a January patch triggered widespread app crashes, Outlook failures, and cloud sync issues, forcing the company into rare back to back ...

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

January patch trips up Azure Virtual Desktop and Windows 365 authentication Microsoft has kicked off 2026 with another faulty ...

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

The first big Windows update of 2026 is a glitchy mess - here's the full list of bugs and fixes ...

Microsoft’s first Windows 11 security update of 2026 broke shutdowns and some Remote Desktop sign-ins. Microsoft has released ...

Windows 11 had a rough 2025. We tracked the top 20 Windows 11 issues reported by Windows Latest, from failed updates to ...

Microsoft's January 2026 update broke shutdown and Remote Desktop on some PCs, and the company has now pushed emergency ...