Microsoft is investigating reports that some Windows 11 devices are failing to boot with "UNMOUNTABLE_BOOT_VOLUME" errors after installing the026 Patch Tuesday security updates.

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 ...

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, ...

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 ...

A recent Windows Update pushed out by Microsoft has been causing big problems for some Windows 11 users, leading to heavy criticism of the company online.

Microsoft is investigating reports of serious boot failures affecting Windows 11 devices following the January 2026 security ...

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 ...