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 has confirmed that Windows 11 24H2 feature updates via Windows Server Update Services (WSUS) are being blocked after installing the April 2025 security updates. Introduced as Software Update ...