When you attempt to join a Windows 2000 based computer to a domain, or use Dcpromo to promote a new domain controller, you receive:
The specified domain either does not exist or could not be contacted.
The System Event log may contain:
Event 7013 - Logon attempt with current password failed with the following error:
Logon failure: unknown user name or bad password.
These problems can occur if the Sysvol folder is NOT shared on the domain controller.
NOTE: This behavior can occur if the DNS Server address points to your ISP's DNS server.
NOTE: Do NOT use Windows Explorer to share the Sysvol. See Knowledge Base article Q257338 - Troubleshooting Missing SYSVOL and NETLOGON Shares on Windows 2000 Domain Controllers.
If the Sysvol is not shared, use Regedt32 to navigate to:
Double-click the SysvolReady value, and change the data value from 0 to 1. Shutdown and restart the domain controller.
When the computer has restarted, open a CMD prompt and type:
nslookup and press Enter.
set q=srv and press ENTER.
To verify that the Sysvol folder is shared, you can either open Windows Explorer, or type net share at a CMD prompt. By default, the Sysvol share is located in the %SystemRoot%\Sysvol\Sysvol folder. You should also check the File Replication Service event log. When replication has completed, on a domain with just one domain controller, Event 13516, The File Replication Service has stopped preventing the computer from becoming a domain controller, should be logged.