Then System Restore to before the event will do the job. If not, look to issues in the device manager from CODE 19, 31, 41 and others in the drive.
I had a problem with both winrip ofr dvd and windows media player after my system locked. It would no longer read my mini-dvds from my camcorder. all was well then it is as if there is no disc in the dvd-rom.
Is there a way to get the programs to recognize these again like a list to select from? I was running Windows XP.