This method was found by me years ago. I have all rights to this method.

1. Go to Xbox.com and Sign In

2. After signing in click on My Xbox and go down to My Account
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3. Click on Update Billing Account Information, Now this will show up.
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4. Go to [ Register or Signin to view external links. ] and click copy a random / strange character.
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5. Paste that in Address Line 1 and 2 and First Name and Last Name. Also make sure Address Line 2 is 1 character short compared to Address Line
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6. Now click on Save. And now go to live.com and sign in with your XBOX Email.

7. Click on Account and click on Change Name
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8. Now change your first and last name for what you had on your XBL Account with the Alt Code. And save it and now go and click on Country / Region and this will show up.
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9. Change Address Line 1 and 2 into the alt keys and make sure Line 2 is a character short. Now save it and this is how it will look like.
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10. Your account is now Unhackable

I hope you guys enjoyed it