By mistake I added a pc to the domain using a name that already existed on the domain. At the time the new pc was joined, the original pc was shut down. When the user tried to log on to the original, a message was displayed to say that the DC was unavailable. How would I get the original pc to be able to log on to the domain. If this is possible, would it effect the user account that is normally logged on to the original pc. I renamed the original pc in the hope that this would rectify the issue, but the problem still remains. Any help would be appreciated.