If the disc is damaged, that's another problem. The game might not recognize it. They should check the disc for scratches or try another copy if available.
I should list these possibilities in steps, starting from the simplest solutions like inserting the disc, checking the drive, using the SETX command, and then moving to more involved steps like checking for drive letter conflicts or reinstalling the game. call of duty 4 please insert the correct dvd-rom hatasi
Next, could it be the wrong disc? If they have a different version (like a mod disc or a region mismatch), the game might not recognize it. The game might require inserting the original disc into the CD/DVD drive. If the disc is damaged, that's another problem