In most cases removing iTunes and its related components from the Control Panel will remove all supporting files belonging to those programs. In some rare cases those files may be left behind. After following the previous steps, you should confirm that the following files and folders have been removed and if any are left behind, remove them now:
After verifying that iTunes is completely uninstalled, restart your computer and then install the latest version of iTunes
A problem occurred when I was attempting to delete C:\Program Files\Common Files\Apple\. I kept receiving the error message that the folder or file in it is open in another program. I already deleted the temporary files and searched task manager, but I am lost now.