Failed to load downloadable content. Data is corrupted

[LEFT]I recently just started receiving this error everytime I attempt to play SSF4:AE 2012. I didn’t always have this error and it just started after I had a friend come over to my house, login to his xbl account, and dl costumes. I tried deleting all DLC and game data. However, no matter what I do it seems to never go away. If anyone can help me or has any ideas I would be most grateful.[/LEFT]

if this is a Xbox 360 HDD, back up any non Street fighter saves and reformat the HDD

So after some time trying to figure out what it was, I realized I overlooked the possibility of having stuff in my vanilla sf4 save data folder. Sure enough all I had to do was delete the dlc from there any everything is normal again