Error: Unable to set the video mode

Just downloaded this product. I thought it was set up to be compatible with Windows 7 or I would have never purchased it in the first place. I downloaded the Red Alert 2 product and tried to play and got Error: Unable to set the video mode. I have gone into the compatibility settings and changed them to a variety of different operating systems including 95, 98, and XP. Should not sell a product that is indicated as Windows 7 compatible when its not. Need some help. Thanks.