IN THE XBOX APP ON WINDOWS Press the Start button, and then enter Xbox into the search bar. Choose the Xbox app from the results to open the app. Select your gamerpic, and then select Settings. Select Redeem under Redeem a code. Enter the 25-character code, select Next, and then follow the prompts. IN THE MICROSOFT STORE ON WINDOWS Press the Start button, and then enter store into the search bar. Choose Microsoft Store from the results to open the app. Select your account in the top-right corner of the screen, and then select Redeem code or gift cards. Enter the 25-character code, select Next, and then follow the prompts. FROM A PC OR MOBILE WEB BROWSER Follow this link, enter the 25-character code, select Next, and then follow the prompts.