MCI error Slides can not play the sound solution

At the school gate on duty, my colleague came over to help me, saying that it was impossible to insert sound into the slide when making courseware. Before coming to his computer, I saw that the system prompts "MCI error can not play the specified file on the specified MCI device, the file may be corrupted or the format is incorrect, or the file processing program without secondary format is available."
< BR> First suspected that there was a problem with the sound card, or the inserted sound file had a problem, but it was normal to play it with other players. Reminiscent of this person's special optimization system, I wonder if it is not in the process of optimization to delete files that should not be deleted. So download the latest version of WINDOWS MEDIA PLAYER (I think it is installed because it is the system's own player, and the sound that is usually released from time to time in the system depends on it) to reinstall one side, the fault is removed.