Windows 11 KB5077181 fixes boot failures linked to failed updates
Bleeping Computer
by Lawrence AbramsFebruary 15, 2026
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.
Verticals
securitytech
Originally published on Bleeping Computer on 2/15/2026