Unable to launch Modern Warfare 2

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Each time I try to launch Modern Warfare 2, I'm getting this error message:
"Please make sure Modern Warfare 2 is run from the correct folder " 


  • In Steam: Right-click the single player mode or multiplayer mode of Call of Duty then go to Properties> Local Files> Verify the entire cache of the game ..
  • Steam will check if any files is missing and download them.

Thanks to Nubkratos for this tip.
Jean-François Pillou

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