When i run cod4. It say please insert correct dvd rom.

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vikas.saini185 Posts 1 Registration date Friday April 4, 2014 Status Member Last seen April 4, 2014 - Apr 4, 2014 at 12:47 AM
When i run cod4. It say please insert correct dvd rom. This game i downlod from net so i have no dvd of that game. I have only setup file. What can i do. Plz help me. I want to play single player