The computer does not recognize a disc or the CD or DVD drive

■ Make sure that the disc label is facing up, then try again.

■ Try a different disc. Occasionally discs are flawed or become scratched and cannot be read by the CD or DVD drive.

■ Your computer may be experiencing some temporary memory problems. Shut down and restart your computer.

■ Some music CDs have copy protection software. You may not be able to play these CDs on your computer.

■ Clean the disc. For more information, see “Cleaning CDs or DVDs”.

■ Restart your computer, then enter the BIOS Setup utility by pressing and holding F1 while your computer restarts. Make sure that the IDE controllers are enabled.

■ Make sure that the drive is configured correctly by following the instructions in the drive documentation.

■ Reinstall the device driver.