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

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

A fresh wave of Windows 11 update trouble is making the rounds, and this one is about as disruptive as it gets: some PCs reportedly can’t boot after installing the latest January 2026 security update.

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 ...

Windows 11 shutdown bug explained with causes, fixes, and workarounds to stop restarts, battery drain, and failed power-offs ...

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 issued emergency patches for Windows 11 this week, but the volume of recent bugs means Outlook Classic is still ...

Microsoft has acknowledged a serious power-state regression affecting Windows 11 version 23H2 systems after the January 2026 ...

Microsoft’s first Windows 11 patch of 2025 “is turning out to be a disaster,” as another raft of incompatibility issues and unintended consequences seems to have hit the first Windows 11 patch of 2025 ...

To fix the Windows Update error 0x80073713, use the following suggestions. However, before proceeding, restart your system and run Windows Update again. See if it ...