I have a legal copy of cod4, one dvd and I made a iso using poweriso and mount with daemon lite and I still get the same error I had with the dvd. please insert the correct dvd rom. Any help would be greatly appreciate.
This is called copy protection. There is some sort of copy protection either in the disc or in the data on it or both. You are required to find out what kind of copy protection that is and then find a way on how to legally circumvent that copy protection.
If your original copy of cod4 also does not work, first consult your game manual, then the company you purchased the original copy from and if that fails contact the manufacturer or distributor of the product.