Things You'll Need
Instructions
Ensure the USB drive is connected to the Xbox 360's USB port if your gamertag data is saved on a USB drive.
Press the "Guide" button on your controller (the center button with the Xbox 360 logo).
Navigate to "My Xbox," highlight your gamertag and press "A."
Select "Change gamertag."
Select "Enter new gamertag." Begin typing in the modified gamertag. A handful of suggested gamertags (related to your current one) will be offered. If you like one of the suggested names, simply select it.
Click "Yes, use this gamertag" to make the changes. If you do not have enough Microsoft Points to change your user name, you will be asked to enter your payment information to credit your Xbox Live account with Microsoft Points to purchase the name change.