Wars Knights of the Old Republic II: The Sith Lords
The CD was accidentally ejected during program installation. What do I do?
If the CD is removed from the drive during installation at any time other than when prompted to switch to the next disc, the installation may be incomplete or the game may crash to the desktop. When this occurs, you may be unable to reinstall through the launcher.
To reinstall the game, insert Disc 1 Play Disc and run Setup, which is located at the root of the CD. This will properly install the game.