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Administrators sometimes encounter error messages regarding Windows 2000 corrupt security settings. One particular example that shows security settings are corrupt occurs when you're unable to open administrative tools such as Active Directory Users And Computers or Active Directory Sites And Services.
In this particular scenario, you might receive an error message such as "Naming information cannot be located because: Logon attempt failed. Contact your system administrator to verify that your domain is properly configured and is currently online." Another error message you might receive is "The configuration information describing this enterprise is not available. The logon attempt failed."
If you're experiencing either one of these problems, the best solution is for you to rebuild the Windows 2000 security settings. To do so, begin by opening a Command Prompt window. Next, enter the following commands:
secedit /configure /cfg %windir%repairsecsetup.inf /db secsetup.sdb /verbose
secedit /configure /cfg %windir%repairsecsetup.inf /db secdc.sdb
Replace x: with the drive letter on which you've installed Windows 2000. When the restore is complete, you should be able to open Active Directory Users And Computers again.