How to deauthorize a computer

No. You can ask the iTunes Store staff to deauthorize all the machines, but both this and the Deauthorize All command merely reset the count on the iTunes Store servers.

Computers you don't have access to can't be deauthorized. The result of using the functions above isn't communicated to them unless the operator checks, and even that doesn't affect the file on the computer which says it's authorized.

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I GAVE AWAY ONE COMPUTER THAT WAS AUTHORIZED. MY 2 SONS HAVE AUTHORIZED COMPUTERS. THE 2 REMAINING ALLOWED AUTHORIZED COMPUTERS WERE STOLEN FROM MY HOME LAST WEEK. I JUST PURCHASED A NEW COMPUTER. HOW CAN I USE MY ACCOUNT? I SIMPLY GET A MESSAGE TELLING ME I MUST DEAUTHORIZE ONE OF MY COMPUTERS BECAUSE I HAVE REACHED MY MAXIMUM OF 5 COMPUTERS. I DON'T WANT TO DEAUTHORIZE MY SONS' COMPUTERS AND I CAN'T DEAUTHORIZE THE ONE I GAVE AWAY TWO YEARS AGO OR THE TWO STOLEN ONES. PLEASE HELP!

Please turn off your caps lock.
It is considered yelling to use all caps.

I HAVE REACHED MY MAXIMUM OF 5 COMPUTERS

Deauthorize all then authorize the computers you want.
See this -> About iTunes Store authorization and deauthorization

don't forget to change your passwords so the deuathorized computer can't contact the itunes store and reauthorize itself!

so the deuathorized computer can't contact the itunes store and reauthorize itself!

???
That cannot happen.
To authorize, you need to input the iTune ID and the password.
It won't "authorize" or fill in the password itself.

i apologize its been a while i just assumed itunes cached the password to the
store in keychain like it does with everything else.

it caches the email address

so maybe the correct answer should of been to change your email password so
someone cannot reauthorize that computer

Message was edited by: rigormortis

I keep running into "User-unfriendly" things on mac lately.
I have not bee able to figure out how to get time machine to read my new Hard drive as my old drive. No longer can you change the UUI. now this.

My EX-GF just took my other macBook Pro. Aside from the Stealing aspect of it, I'd like to just cut off the authorization to that computer. I don't want her downloading things I paid for. And Apple has that fun thing about only downloading ONCE, so if she beats me to the download, I'm hosed.
I also don't want her using my library anymore.
I only have 3 items authorized, not 5.