Unlike the PlayStation 3 or Nintendo Wii, which can be modded purely through software exploits or custom firmware loaded from a USB drive, the Xbox 360 features robust hardware-level security. Microsoft built the console with a secure bootloader that prevents unsigned code from running, no matter what files you put on a flash drive.
Websites like Se7enSins or RealModScene serve as archives for the development of homebrew applications and custom dashboards like Aurora. Xbox 360 Jailbreak Usb Software Download Free