What if the computer I want to deauthorize is no longer working?

Use the Deauthorize All function.

(72741)

It doesn't make any difference. Authorization does physically attach to the computer.

About De-authorizing Computers (contributed by user John Galt)

You can de-authorize individual computers, but only by using those computers. The only other option is to "de-authorize all" from your iTunes account.

1. Open iTunes on a computer

2. From the Store menu, select "View my Account..."

3. Sign in with your Apple ID and password.

4. Under "Computer Authorizations" select "De-authorize All".

5. Authorize each computer you still have, as you may require.

You may only do this once per year.

After you "de-authorize all" your authorized computers, re-authorize each one as required.

If you have de-authorized all computers and need to do it again, but your year has not elapsed, then contact: Apple - Support - iTunes - Contact Us.

Also, see iTunes Store- About authorization and deauthorization.

Deauthorize all computers is not an acceptable solution.... Apple needs to fix this.... obviously they take information from a authorize computer we as users need to be able to see that list and pick a system we no longer want authorized.