The directx installation fails, saying that it can't copy a necessary file. I tried installing many different versions of direcx 9c (from microsoft.com and other video games CDs) but it all does the same thing now.

When I try to load Civ IV it says it can't find a certain DLL for direct x and nothing happens. :(

All my other games run fine though.... whats going on? :confused:

Are you sure you did a clean uninstallation of DirectX first? I would make absolutely certain that DirectX is completely off the system first.

I'm getting "A Cabinet File Necessary for Installtion Cannot be trusted message when Civ 4 tryed and installed Direct X 9c. But I already have DX 9c. Then when I try to load the game I get "a D3DX9_26.DLL was not found. Reinstalling the application may fix this problem" And the game won't run. I uninstalled the game and reinstalled, but I get the same thing. Can anyone help??

Check here for help:

http://forums.civfanatics.com/showthread.php?t=133190