Q: dehautorize all computers

Hello allynna_84,

The steps below detail how to go about deauthorizing all computers on your account.

How do I deauthorize all of my computers?

Using one of your authorized computers, follow these steps:

1. Click to open your account in iTunes (you may need to sign in with your Apple ID). Or open iTunes, click Store > Sign In, and enter your Apple ID and password.
2. Click Deauthorize All.
   
   The Deauthorize All button appears only if you have more than 2 authorized computers. If you don't see the Deauthorize All button, that means you only have one authorized computer.

Deauthorize your Mac or PC using iTunes

http://support.apple.com/kb/HT6283

Cheers,

Allen