Awhile ago I had trouble booting into WIN2K after uninstalling one version and installing a different version of some software. After rebooting, the keyboard and mouse wouldn't work when I got to the logon screen. I finally had to resort to Last Known Good Configuration to restore functionality. Afterwards my registry contained the following keys: HKLM/System/Select ControlSet001(failed) 3,130 KB ControlSet002(default) 3,543 KB ControlSet003(last known good) 3,137 KB CurrentControlSet(current) 3,581 KB Having copied the various ControlSet keys to a text file and doing some comparisons, I noticed that the ENUM keys for Kbdlass and Mouclass were missing in the failed configuration. While the problem was fixed, the LKG (ControlSet003) now present is an almost identical copy of the Failed ControlSet001, i.e missing the ENUM parameters. Is it possible somehow to remove the failed set and have LKG revert to a good configuration? I thought this was supposed to happen automatically.

This happens automatically at the end of the boot process. It needs just one clean reboot and your LKG will become a good one and after next good reboot you will have new LKG. This does not mean that your CS001 disappear. David Matousek, founder of Matousec - Transparent security

But LKG has not reverted to a clean version; it still lacks the ENUM entries mentioned above. Notice the KB size of CS001 & CS003. What gives?