A friend of mine had to do just that. He ended up having to email apple and asked them to deauthorize ALL of his computers. (It's easy enough to re-authorize when it asks you again)<br><br>Gotta say, I recently sent them a similar email for my accounts, and I havn't heard back yet, so I wouldn't expect a speedy resolution.<br><br>Basically, only apple can do it.<br><br>