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

Round and round we go.

Windows 11 runs into another disastrous bug with its latest update — Microsoft admits an 'issue in which devices are failing to boot', worryingly.

Everyone knows you need to keep your operating system up to date, but what happens when a company botches the update and ...

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

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.

Microsoft is investigating reports of serious boot failures affecting Windows 11 devices following the January 2026 security updates. Users have reported encountering “UNMOUNTABLE_BOOT_VOLUME” errors, ...

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 ...

It is known that Patch Tuesday updates can often lead to big issues and something just like that happened last year in August. The security update had broken dual-booting Windows 11 and Linux systems ...

Microsoft said my PC can't run Windows 11, but I upgraded in 5 minutes anyway - here's how ...