Follow instruction to get rid of the gamma fing so your screen isnt bright or black

1)put account on computer with usb or transfer cable
2)open your account in modio or other tool like modio
3)delete the 41560817.gpd only or your account will corrupt
4)rehash and resighn and move your acount back to your xbox with usb or transfer cable
5)start mw2 and change your options to how you used to have them