But it does not in case with DOS? Interesting.
Could you please remove current drivers you have installed (they are from dell, right?), download DriverSweeper and clean up the leftovers, and then install latest drivers with AMD Mobility Tool. Plug in power cable and set "High Performace mode" and try again to force the game to run on on your Radeon.
Seems like DOS cannot detect your 7570M. There is a chance it could be solved with new drivers but otherwise you will have to contact Larian support describing the problem.
It reminds me:
http://forums.totalwar.com/showthre...se-my-graphics-card.-AMD-Radeon-HD-7670M