can this silent update corrupt another box through usb drives ? a friends box was working until i played my profile on his box from usb . after i left his games ( mw3 , skyrim etc ) wont play . what i did was used his unmodded slim to update my gamescore . then played a game offline on his modded box . when i got home my games still work , so how can this update be installed on my usb stick / i thought the update was on the nand ?