Help with iTunes

I've installed the software that came with my iPod but keep getting a Program Error "iTunesHelper.ex.exe has generated errors and will be closed by windows. You will need to restart the program". When I open iTunes I then get another error message "The software required for communicating with the iPod is not installed correctly. Please reinstall iTunes to install the iPod's software". I've uninstalled and re-installed the iTunes software about 20 times and still can't get it to work. Can anyone help me?

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