I am Vinod. I will try my best to help you resolve this issue.
I believe you are trying to uninstall and reinstall itunes and its components. If you are not able to uninstall certain components, download the windows cleanup utility from http://www.softpedia.com/get/Security/Secure-cleaning/Windows-Installer-CleanUp-Utility.shtml . Once installed, go to start > programs > windows install cleanup and using that, uninstall itunes, quicktime, apple software update, apple mobile device support and apple application support. Then restart the computer and install itunes, Windows cleanup utility is a free software and the download button looks like this.