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

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

Windows 11 January 2026 updates may cause boot failures on some PCs. Microsoft is investigating issues linked to KB5074109.

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

Here's the pitiful story:<P>To install SQL2000 SP2 I tried to unpack the archive after dloading from ms.com. I hear the HD spindown (or shutdown- very odd- and not anything else, just the HD) then ...

My Dell Precision M90 laptop has resorted to giving me BSoD with "Unmountable Boot Volume." I have followed MicroSoft's advice and accessed the Repair console, from which I am running "chkdsk ...

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.

It's not just January's one.

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 issues second emergency patch for Windows this month - update your PC today ...