Do you manage to have the launcher window? The one with the different options "play", "uninstall" etc. If yes, you might find a technical support link or something and should be able to launch a diagnostic. 5orry I don't remember much what it looks like; right now the game is installing in my computer, so I can't try what I say.
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And you have this thread, on the top of these forums: http://www.gamesas.com/topic/31-step-by-step-ctd-crash-troubleshooting/