If you get an "username or domain not found" error message when you are trying to log into the network, then check your username and/or domain you have typed at the computer you are trying to log into.

The network could not validate your username

Your username is incorrect. Check the username you have typed at the computer you are trying to log into.

The domain password you supplied is not correct, or access to the logon server has been denied

Your password is incorrect. Check the password you have typed at the computer you are trying to log into.