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.

The post Windows 11 boot issues tied to bad December update appeared first on Android Headlines.

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

Microsoft is shifting focus to fixing Windows 11 performance and reliability after months of buggy updates, boot failures, ...

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

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 ...

Microsoft has had to issue two out-of-band updates to fix its buggy Windows 11 patch.

Microsoft shares more details about the boot failure bug triggered by the latest Patch Tuesday update, KB5074109, in Windows 11.

Microsoft has confirmed that the boot failures with its January 2026 Windows 11 update are limited to “commercial” PCs and happened due to the December 2025 update failing to install and PCs being ...