Get the latest system update file from the Official Xbox Support Page .
If you cannot connect your console to the internet, you can use a PC to download the update and transfer it. i--- Xbox 360 Dashboard Update Download
Plug the USB into your Xbox 360 and restart the console . The update process should start automatically. 3. Update from a Game Disc Get the latest system update file from the
If an update is available, select to download and install. 2. Manual Update via USB Flash Drive i--- Xbox 360 Dashboard Update Download