The trust relationship between this workstation and the primary domain failed er

Relationship issues are fun!!

When you try to access a computer running Windows NT Server or Workstation that is a member of your domain with one of the following method, and it fails... it will show this message:

System Error 1789 has occurred. The trust relationship between this workstation and the primary domain failed.

Cause:

The computer's machine account has the incorrect role or its password has become mismatched with that of the domain database.

Fix:

Log on locally as a local administrator (If you can). In the Network tool of Control Panel, select Change and enter a Workgroup name, leaving the domain. Restart the computer and log on locally as a local administrator.

Or

You can delete the existing computer account in Server Manager, recreate the computer account, synchronize the domain, and then on the client rejoin the domain.

I've struck this issue a few times, always with Windows 7 clients and Server 2003.
If you can't log in locally try logging in as a domain administrator with the network disconnected (unplug LAN and disable wireless), this will allow the use of cached credentials.

Once your in ..
Reset the local administrator password
log off and on as the local administrator to test it
Disjoin the domain (change to a workgroup member instead)
Restart as prompted
Log in as the local administrator
Rejoin the domain

hmmm... and that didn't work this time?

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