This problem can occur because of a computer security identifier (SID)
mismatch or a misconfiguration that can be
caused by third-party products that are used for imaging and changing
The changes to the SID may be transferred to a Windows 2000 Professional
installation during the upgrade process from a Windows NT 4.0-based
computer that may have been imaged incorrectly. By design, the security
hive and the features are not changed during Windows NT or Windows 2000
The only supported way to resolve this issue is reinstall the operating
HERE IS AN UNSUPPORTED HACK THAT MAY WORK
1. open regedt32.exe and delete the value
2. Then reboot.
3. Following the reboot, login as the local user "Administrator" and than
try to leave the domain for a workgroup.
4. If you are able to disjoin from the domain, reboot and log in again as
the local user "Administrator" and attempt to join the domain.