Hello, I have been having a similar problem to this "billing loop". Whenever i make a purchase on the itunes store, it will download, however, it will say processing file after downloading and never physically transfer to my library. This problem has cost me almost ten dollars now because it will go to the point where i have to manually shut down my computer because it will freeze the screen to the point where i cannot even open the task manager. If someone could please help me out, i would like to actually be able to buy a song and have it in my library.