Board Thread:Online Discussion/@comment-151.252.253.1-20151123153656/@comment-6881629-20151123163939

The official response would probably be create a game consultant file and send it to their support team, maybe try starting up the client as a administrator then try repairing otherwise the only thing i can think of is a full reinstall.

ESO does have a official forum here with a support section (which is where the links above come from).