A few days ago, iTunes all of a sudden stopped starting, and will say that it needs to close. I didn't change versions or download any updates. I've tried uninstalling/reinstalling, installing different versions, and repairing, I always get the same error message. I've even tried dragging the iTunes music folder to the desktop to avoid any corrupt files. I've also tried running iTunes on my Guest account and it still will not start. Apple's support is a joke and I could really use some help. Thanks in advance.