Last Known Good
is a term used to define the configuration of Windows NT
or Windows 2000
at the last successful logon
. One would select Last Known Good Configuration during bootup
if new software
of some sort had been installed that prevented the OS from loading.
I have never seen LKG work
I do have a co-worker that once took a machine out of a domain and placed it in a workgroup, booted up & realized he didn't know the local admin password or what any of the local accounts were, did an LKG and he claims the machine was back in the domain & he could log in. I don't know for certain if this is true.