A friend bought a new computer. He had a CD-R disk he was keeping some files on. He tried to write a new file to the disk and now his drive does not recognize the disk at all. When he puts the disk in the drive nothing happens. If you go to the drive in Vista's Computer folder and try to read the disk, the tray opens and a prompt says to insert a disk, but the disk is in the drive.
How do you recover the data from the disk?