Why it shows to insert the correct CD rom after the installation of the game Tomb Raider Legend?

The message to insert the correct CD-ROM after installing Tomb Raider Legend typically indicates that the game requires the original disc for authentication to verify ownership and prevent piracy. This is a common practice in many PC games to ensure that only legitimate copies are played. If the game cannot detect the correct disc, it may not launch or function properly. Additionally, some users might encounter this issue if the disc is damaged or the drive fails to read it correctly.