Currently Being ModeratedJun 18, 2013 10:49 AM (in response to andre stanley)
Hello, andre stanley.
To deauthorize all computers associated with your Apple ID you will have to go into the iTunes Store (easier on a computer).
From the iTunes Store homepage you will sign into and view your account by clicking on your apple id at the top left-hand section or the Account section in Quick Links
From there, it should show your Apple ID Summary and you can deauthorize all computers associated with the ID
You can only do it 1 time in a 365 day period, so use it wisely
Hope this helps.