Yojimbo95

How to change my xbox 360 for every boot startup will go into xbox dashboard not freestyle dashboard? Another thing is when i turn on my xbox 360 and go into xbox dashboard, then i plugged in a usb drive which contain $systemupdate file, when i press yes to install the update, the xbox 360 will restart the console, after restarted my xbox 360 is freeze with black screen. Anyone know how to fix it? Any suggestions are much appreciate Thank you