I have been playing civ 4 for about two months and two days ago it popped up a message saying that there was an error and it needed to be uninstalled. So i went to the uninstall wizard and tried to uninstall it... it said that there was something wrong with the files so it couldn't uninstall it. Then at a loss I went to the great information source called the Internet. I manually uninstalled the game files and what ever else it told me to do with the registy editior and deleted the shortcuts. When I went to install the game it says that a updated version of the game is already installed vs. 7. whatever and the game i have is 6. whatever. does anybody have any ideas on what i missed or how to get it to install.
There is an immage of the error image when I try to install

