Microsoft says it has resolved a Windows 11 bug that caused some commercial systems to fail to boot with an "UNMOUNTABLE_BOOT_VOLUME" error after installing recent ...

Today I was humiliating bots on quake & got bored & decided to watch a movie on telly. So I Ieft the computer on the quake menu & turned the monitor off (useally I just let the screensaver take over & ...

So my dad's system (Duron 1.1, XP Home, 1GB memory) refused to boot to normal Windows or Safe Mode, stopping with the beloved 0xED Unmountable Boot Volume.<BR><BR>I booted off the installation CD and ...

The boot issue, which Microsoft previously investigated and linked to failed December 2025 updates, affected a limited number of commercial Windows 11 devices running versions 25H2 and 24H2.

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, ...