I just put in a ATI Radeon HD 4500 by Asus. The game barely worked with my GeForce 7800. I have Windows 7x64. I purchased the game through Steam.
The game started fine; I went into settings, upped the graphics quality, and started changing resolutions. I must have chosen one my card would not support, because it froze the game and tossed me back to desktop. Now whenever I try to fire it up the game tells me it cannot initialize Direct3D, and that I need a card that supports pixel shader 1.2.
Things I've tried:
uninstalling and reinstalling;
running the Direct3D setup in the game folder;
Verify integrity of game cache;
deleting the prefs.prop file.
I'm thinking I need to reset the resolution, and perhaps the game is reinstalling with my previous settings? Thanks for any help.