Itunes Failed To Download Software Update ((free)) 【90% Limited】

: Plug your device directly into a USB port on your computer rather than a USB hub or keyboard port, which may lack sufficient power for large updates. Common Error Codes and Their Meanings

: Reboot your computer and your iPhone/iPad to clear minor process stalls. itunes failed to download software update

Understanding the specific error code can point you directly to the fix: : Plug your device directly into a USB