If you are having problems with your game you need to disable desktop composition in the compatibility tab under properties for the game.
Right-click on the Divinity II: Ego Draconis icon on your desktop
Click on Properties in the menu that pops up
In the Window that comes up click on the Compatibility tab at the top of the Window
On the Compatibility tab click the box next to "Disable Desktop Composition"
(For Vista and Windows 7 users) Also click on the box next to "Run as Administrator"
After that click on the Apply button at the bottom and you are done.