I downloaded the student discounted Windows 7 Professional from digital river, when I purchased it, the files came as a .iso file or a .exe file. I tried to download the .iso file (because I know I have to use disk utility and burn it onto a dvd) but when I click to download the .iso file (from the Macbook Pro) it refuses to download and text edit opens up. I have searched everywhere on how to download the .iso file but all I can pull up is how to burn the .iso file onto a dvd. What should I do?