1) Go into the "device manager" which is found by entering System in Control Panel and then clicking on the "Hardware". Find the display drivers and the right click on the card that is NOT your main graphics card, and choose disable. Reboot and try again.
2) Update the drivers for the integrated card. For example updating drivers for "Enhanced Display Driver Helper (ASUS Other Device)" has been reported to fix this issue.
3) Enter the control panel for the graphics card and set the proper (non-integrated) card as the preffered device to use. Here is how it looks for a user:
http://frictionalgames.com/forum/thread-...l#pid34691
4) Enter Display Properties and make sure that the desktop color depth is 32.