tris1979 said:
The problem is not only with wonder movies but also with the sound on the video that shows the 2K and Firaxis logos when starting the game.
Aha.
It seems that anti-aliasing only affects in-game movies. I haven't seen anybody mention the title screens stuttering before.
On my system, it's the wonder movies and end sequence movies that don't work with AA. The opening logos are just fine under any setting.
First thing to do is make sure your video drivers are bang up to date:
https://support.ati.com/ics/support/default.asp?deptID=894
http://www.nvidia.com/content/drivers/drivers.asp
One of those, depending on your card.
Alternatively, the OMEGA drivers might be for you. These are unsupported drivers (not made by ATI or nVidia) and no one will take any responsibility if you kill your system with them. I use em cos I like the danger hehe.
http://www.techpowerup.com/downloads/
Alternatively, it might be your soundcard. Without knowing what you have inside, it's impossible to say where to point you. So, assuming you're running xp:
Go to My Computer, then under System Tasks on the left-hand side pick Change A Setting.This takes you into Control Panel. From here, double-click on the "system" icon. Then choose the "Hardware" tab and click on the "device manager" button.
Now we're where we want to be, we can get down to business. You should see a bunch of categories with + symbols next to them. You need to open up a few of these and note down what's inside.
First we need to know what video card you're running. Next to Display Adapters, click the + sign and make a note of everything that appears - there should be one or two, at most three entries. Write them all down to be on the safe side.
Then, open up "sound, video and game controllers" and note down the name of each entry. One of these will tell us what soundcard you're using. Post or pm the info to me and I'll see what I can find.
Alternatively, if you know the make/model of your soundcard, try googling it along with the word Driver.