Go to https://www.xbox.com
Login to your account
Hover over your account link (the top right of the screen) a menu will appear, click on the "Redeem Code" button.
On the next page, click "Redeem"
Enter your code
Click "Confirm"
Click "Confirm" again to assign the key to your account.
Login to your account
Hover over your account link (the top right of the screen) a menu will appear, click on the "Redeem Code" button.
On the next page, click "Redeem"
Enter your code
Click "Confirm"
Click "Confirm" again to assign the key to your account.
