I had this problem happen before. I quick restart did the trick before, but this time it's not fixing the problem. DVDs and CD are not recognized when I insert them. It looks like its sometime to do with the OS and the burner. The burner is working. I can bypass it in DVD SP and iTunes, but when I just put in a disk to drag and drop something, it won't recognize. Do I have to reset something. If anyone knows that would be great.