If you are having problems redeeming a prepaid code on Xbox LIVE, here are some possible solutions.
If you've purchased a prepaid code or Microsoft Points for Xbox LIVE or Xbox Music content, find out how to redeem them on your Xbox 360 console, in the Zune software, or by visiting Xbox.com.
Find answers to frequently asked questions about Coinstar and how to use it to purchase Microsoft prepaid codes.
If you’ve purchased and downloaded a game through Games for Windows – Marketplace, the game keys and the Games for Windows LIVE access token are stored in the client software. Learn how to find them for later use.
If you've purchased a prepaid code or Microsoft Points for Zune content, find out how to redeem them in the Zune software or by visiting Xbox.com.