Is there anyway to deactivate all the computers for iTunes?

I have registered my iPhone 5 in five computers and all the computers are dead or have been sold. I want to now register my phone to my new computer. Is there a way to deactivate all the computers? When I open iTunes & click "view account" & then put in my account ID and password it says "We could not complete your iTunes Store request. The iTunes Store is temporarily unavailable. Please try again later." I have been trying for about 3 hours now. Nothing has happened.

If you have a Macbook then once you click onto the store on the top of your screen an icon that says store should pop up and scroll over that and you will see a tab for reauthorizing computers

http://support.apple.com/.../kb/ht1420 this is the apple support website for deactivating and activating your account on a computer. There's a link that allows you to deauthorize on all computers: { http://support.apple.com/...20#allComp }
If it's saying that it's unavailable you might have to wait about 24 hours because the itunes store can't be used, meaning it's under restoration or something like that, which could take longer. Hopefully the links I have given help you figure out how to do this. They give simple step by step tools. Let me know if you have any more questions! Hope this helps!

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