Having trouble running iTunes version 11.0.2 on a Dell Laptop running Windows 7 Professional Service Pack 1. Keep getting an error message "the software required for communicating with iPods and mobile phones was not installed correctly..." reinstalled

Having trouble when I launch iTunes (version 11.0.2) on my Dell Laptop running Windows 7 Professional (service pack 1). I get an error message indicating software required to communicate with iPod and mobile phones was not installed correctly. Do you want iTunes to try to repair this for you? I normally respond with OK and it immediately tells me "could not be repaired. Please reinstall iTunes..." I have done this a number of times to no avail.