Windows 11 KB5077181 fixes boot failures linked to failed updates

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 ...
WinBuzzer

Windows 11 Update KB5077181 Traps Users in Boot Loops

Microsoft's KB5077181 security update has caused endless restart loops and system lockouts for Windows 11 users, with no ...

Windows 11 update KB5077181 is causing critical boot loops for some users1 1

KB5077181 is causing devices to restart over 15 times in an infinite loop. Users also report network issues and error codes.
HotHardware

Microsoft's Emergency Windows 11 Update Arrives To Fix Recovery Failures

A few unfortunate users of the Windows 11 October 2025 update (and Windows Server 2025) may have stumbled upon a critical issue where the Windows Recovery Environment (WinRE) failed to pick up mouse ...