Instructions
Turn the Xbox on. Remove any game or DVD from the disc tray. Scroll to the "My Xbox" tab.
Select "Join Xbox Live." Read the Terms of Use. Press the "A" button to agree to the Terms of Use.
Use the virtual keyboard to enter a "Gamertag," which will be your identity associated with Xbox Live.
Create a Windows Live ID. If you already have one, you can associate it with your Xbox. Otherwise, you will be required to create a new one. Enter a language, date of birth, name, address and valid email address. Accept the Terms of Use by pressing the "A" button.
Select the "Silver Membership" option. Select a gamer picture. Select a gaming level (for a Silver account, it does not matter which one you choose). Press "A" to complete the registration.