It’s possible that the file type which you trying to play is supported by WMP but the file was compressed by using a codec that is not supported by the Windows Media Player.Now before moving forward, we need to confirm these two steps which seem crucial in fixing this error: Make sure to create a restore point just in case something goes wrong. Method 6: Reinstall Windows Media Playerįix Windows Media Player cannot play the file.Method 3: Set Proper Audio Device in Windows Media Player.Method 2: Try Playing Different File Format.Method 1: Try Playing the File in another PC.