I would say its the Hi-Def pack that is causing the problem for you. Your graphics driver should not be a problem for this.
Here are the specs on my card, taken from the configuration program in DA2:
Processor: Intel(R) Core(TM) i7 CPU 975 @ 3.33Ghz
Clock Speed: 3333 MHz Physical Memory: 5.990GB
Display Adapter: NVIDIA GeForce GTX260 VRAM: 1.75 GB
Driver version: 258.96
Sound Adapter: Speakers (Creative SB X-FI)
Driver Version: 6.1.1347
O.S. Microsoft Windows 7 Ultimate
DirectX Version: DirectX 11 (Jun20010) or later
I couldn't recognize the GPU with any of these specs. I've never looked for it before.
If it is the data pack, do you have any idea how I might uninstall it from my machine? I don't mind uninstalling the game again. As usual, special thanks to you and thanks to anyone else that's answered this post.
The latest stable graphic driver for your card is 266.58 (or 267.24 beta driver), try updating it. Since your card can only handle directx10, the max graphic detail setting you can use is on "high" with renderer set to directx11. The "very high" setting required a directx11 capable card. As for the hi-res option, you should see no problem if you enabled it with latest driver.
[Edited by iosa, 3/16/2011 11:39:01 AM]