> Windows 11 KB5077181 fixes boot failures linked to failed updates
[AUTHOR: Lawrence Abrams]
[DATE: 15/02/2026 22:08]
[LANGUAGE: EN]
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 security updates, with the fix delivered in the February 2026 Patch Tuesday update. [...]