Question : Logon Unsuccessful

We have a Windows 2003 Server network. Most computers stay on overnight. When i come in the morning and i try to go to \\192.168.3.* which is my server, i get a Logon Screen in which you can type your username and password. When i do, it tells me

Logon Unsuccessful: The username you typed is the same as the username you logged in with. That username has already been tried. A domain controller cannot be found to verify that username.

When i reboot the computer, it connects to it fine. But it just seems that when i come back in the morning, this happens. I have to reboot my computer every single time.
This is also bad because other computers are running backups and they cannot run the backup because of the same problem.

Any suggestions?

Answer : Logon Unsuccessful

If this happens to some specific machines only then you can try and rejoin these machines to the domain again.

Just bring them to the workgroup first and then join them back to the domain.

This will refresh the machine account and the secure channel password.

That should solve your problem.