You also have to hide the update to prevent WU from reinstalling it for you, but actually not even that will permanently disable it.

This is because Microsoft will release "updates" to that package, with the totally unintended side effect of unhiding and reinstalling the update. So even if you uninstall it, and hide the update from WU, it will still find a way onto your system.

So yeah, like I said and despite the downvotes, it's fucking adware. Bordering on malware.