If you were one of the many who received an accidental ban. The reason for this ban was due to Halo Reach's ap25 check failed challenge with many people. This actually also happen with people who didn't modify their consoles as well. Chances of you being banned were probably due to Halo Reach failed ap25 challenge. There is a tool out there that can let you read your sec data. Val something, check and see if the results give you a failed ap25 challenge and check and see the ap25 games you played and if Reach was one of them then there you have it. Check the disk data if possible and make sure abgx shows everything is positive then reburn.