Things You'll Need
Instructions
Download the Xbox 360 software update from Microsoft's website (see Resources). This software update will come in the form of a .ZIP file.
Put your Xbox software update on a USB flash drive. Insert a USB flash drive into your computer. Right-click the Xbox 360 software update file and click "Exact All." In the window that opens, click "Browse" and select the icon for your USB flash drive. This will put the necessary update files on the flash drive.
Burn your Xbox 360 software update to a blank CD. Put a blank CD in your computer and click the "Burn a Data Disc" option in the AutoPLay window. Right-click on the Xbox 360 software update you downloaded and select "Extract All." Select the icon for your blank CD. In the blank CD window, click "Burn to Disc" to create a blank CD using the software update.
Plug your USB flash drive into one of the USB ports on your Xbox 360. If you used a blank CD, put the CD into your Xbox 360 like you would a regular game disc. This will update the software on your Xbox 360 without using Xbox Live.