Star Wars Knights of the Old Republic II: The Sith Lords

I'm experiencing issues when trying to install and/or start Star Wars Knights of the Old Republic II: The Sith Lords. What could be the problem?

Star Wars Knights of the Old Republic II: The Sith Lords does not access the game CD during play. However, if you are experiencing problems when installing or launching the game, your CD-ROM drive may not meet the minimum system requirements to run the game or there may be a problem with your drive.