: Obtain the SystemUpdate_17559_USB.zip file from a reputable source like the Softpedia Microsoft Firmware Mirror or Digiex .
Unplug any Ethernet network cables to force the system to read the USB media locally. systemupdate17559usbzip
If the update halts mid-way and displays a status code sequence, it usually indicates a hardware mismatch or a corrupted download. : Obtain the SystemUpdate_17559_USB
How to Fix Missing Avatars & Kinect on Xbox 360 (Update 17559) systemupdate17559usbzip
If the console boots to the normal dashboard without prompting, check your folder naming. Ensure the folder is named $SystemUpdate with the dollar sign, and that it sits on the root of a FAT32-formatted drive.