Things You'll Need
Instructions
Open Microsoft's Xbox 360 update page.
Scroll down on the page and click "Click Here" under the "Update Using a USB Flash Drive" header.
Click "Save" to save the file to your computer.
Double-click the downloaded "SystemUpdate" zip file on your computer and double-click the "$SystemUpdate" folder inside it.
Click "Organize" and "Select All," then click "Organize" and "Copy."
Plug a USB flash drive into your computer's USB slot.
Click "Start," click "Computer" and double-click the icon of your USB flash drive.
Click "Organize" and "Copy" to copy the update files onto your flash drive.
Right-click the "Safely Remove Hardware and Eject Media" icon in your computer's system tray after the files finish copying, and click "Eject" for your USB flash drive.
Unplug the USB flash drive and plug it into your Xbox 360's USB slot.
Turn the Xbox 360 on or restart it if it's already on. The Xbox 360 updater starts automatically.
Select "Yes" when asked if you want to update the Xbox 360 software.