FROM A WEB BROWSER: Go to this website. Log into your Microsoft Account. Enter the key and click Next. 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. ON XBOX ONE AND XBOX SERIES X|S: Press the Xbox button to open the guide, and then select Store. Press the View button to open the side menu, and then select Redeem. Enter the 25-character code, select Next, and then follow the prompts. ON XBOX 360: Press the Guide button on your controller. Select Games & Apps, and then select Redeem Code. Enter the 25-character code, and then follow the prompts to complete your redemption. Please note that Xbox 360 codes can ONLY be activated on the Xbox 360 console directly!