"Ditto" on the bad CD, or dirty CD, or dirty lens on the CD drive. First thing I do is clean the CD (warm water, dish detergent, don't wipe "around" the CD, wipe "out from the center"), and a session with a cleaning disk in the CD-ROM/DVD drive. If that doesn't cure it and you can read other CD's, the CD you can't read is kaput.
The drive wont read other CDs.......