The Specified Domain Either Does Not Exist or Could Not Be Contacted
When you try to add a computer (XP, SERVER 2003, WIN7, etc) to a domain, you get: "The Specified Domain Either Does Not Exist or Could Not Be Contacted"
If I know that the domain does exist, check to make sure the computer you are working on has the right network settings. You may have to release and renew the IP address. Usually, the DNS is incorrect. If it still doesn't work, set the WINS server as well.