fter updating to a new version of iTunes, sometimes programs that interface with iTunes (like iTunes Sync) will stop working. This is caused by iTunes failing to register itself correctly as a COM object. This problem can show itself in different ways, but in iTunes Sync you will usually see an error like this:
"System.InvalidCastException: Unable to cast COM object of type ‘iTunesLib.iTunesAppClass’ to interface type ‘iTunesLib.IiTunes’."
Just download and run iTunes COM Fix to take care of this issue. It will attempt to register the new iTunes executable as a COM object so that any programs that rely on the iTunes API will start working again, without having to re-install anything. iTunes COM Fix is just a simple executable, with nothing to install, so it’s quick and easy to use.