Could be the disk itself if other CD's work okay.
Clean the CD
Use a CD-ROM cleaning kit, or gently wipe the silver side of the CD-ROM with a
soft, lint-free cotton cloth. Do not use paper. Paper can scratch the plastic
and leave streaks. When you clean the CD-ROM, wipe from the center of the disc
outward. Do not use a circular motion.
If the disc still does not perform correctly, clean the disc by using warm water
or a CD-ROM cleaning kit. Dry the disc thoroughly and then test the disc again.
Examine the CD
Examine the CD for visible deformation or scratches. If the disc is damaged,
contact Microsoft Sales at (800) 360-7561 to obtain a replacement CD.