Xbox freeze fix please help me.?

My xbox elite was working perfectly. Then I tried to do an aimbot usb hack from youtube. I didnt follow through though causeI was scared of getting banned. All I did was transfer a profile to the usb tHEN OFF MY XBOX. A couple of hours later I turned on the xbox then right when it signed in to live it started showing thedashboard then it froze. I tried A couple of more times restarting but same. Then I disconnected xbox from live via the ethernet cable. It signed in fine but then now it freezes browsing the dashboard. So I thought it was the harddrive freezing it. So i took out the harddrive and tried playing a game.But now like 2 minutes into the game including the start up and menus of the game it would freeze. Its not the discs because it happens with all my discs some even barely any scratches. Please help. Im 15 and im not very tech savy and my parents didnt buy the warranty.I already tried formating and clearing the cache but still nothing.