Things you can try to make the game boot:

- reducing your desktop resolution and then booting the game.
- installing directx9 (even if you have dx10 or dx11 does not mean dx9 is installed on your pc)

Please let us know if this fixes the issue.

http://www.facebook.com/dragoncommander
http://www.facebook.com/DivinityOriginalSin
http://www.youtube.com/larianstudios