But don’t panic. Windows 11 has replaced it with something (arguably) much better. Let’s break down why Microsoft killed it, and how to fix a bad boot in Windows 11 today. The LKGC was a product of a different era. It worked by saving a copy of the registry key HKLM\System\Select (specifically the LastKnownGood control set) after a successful user logon.
If you’ve been working with Windows for a long time—say, since the days of Windows XP, 7, or even 10—you probably remember a specific safety net. It was called Last Known Good Configuration (LKGC). windows 11 last known good configuration
Technically, the LastKnownGood control set still exists deep in the registry hive ( C:\Windows\System32\config\SYSTEM ). However, there is to activate it in Windows 11. But don’t panic