I was getting this message to “Uninstall office15 click-to-run extensibility Component”
Open “Regedit” and navigate to HKEY_CLASSES_ROOT\Installer\Products\ path.
Next delete the following two registry entries.
HKEY_CLASSES_ROOT\Installer\Products\00005102C80000000000000000F01FEC
HKEY_CLASSES_ROOT\Installer\Products\00005105F80000000100000000F01FEC
Navigate to C:\program files\Microsoft Office\directory. If you see the Office15 Folder here remove it.