The noble Atreides, the insidious Ordos and the evil Harkonnen. Only one house will prevail.... This forum is for the discussion of Intelligent Games' C&C inspired recreation of Westwood Studios' Dune 2.
Do right click on the Ra2 or YR icon on your desktop and see what is the .exe file it has associated to it. If it's game.exe or gamemd.exe change it to ra2.exe or ra2md.exe. (The md extension is for YR)
Then click on the 'compatibility' box and run the compatibility problems solver or manager which is the first button of the window, follow the steps and leave it to recommended configuration that is probably going to be 'windows sp3'.
Test the game and see if it works.