I think "Apple Software Install Cache" should be removed from the Common Cleaner. Can't repair/Modify the installation of iTunes when installer files are removed. Also, iTunes does not completely uninstall when these files are missing.
C:\ProgramData\Apple\Installer Cache
C:\ProgramData\Apple Computer\Installer Cache
It is not recommend to remove the installer files. Please see a response from Apple.
https://discussions.apple.com/thread/6484542