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

UPD:

Additional, you could try some tricks:

1. Enter the BIOS during laptop boot process and try to find an option related to "integrated/interal gpu/graphics". I haven't seen such on modern Dells but if you are lucky it may happen you can disable it in there.

2. Try to run some small application that for sure uses your Radeon. May be Windows Media Player? Something like that. And then start DOS. I remember a year or two ago it did trick for me i na similar case.