Torrent Issues

So I have a buddy who is wanting to get into WOW. He keeps attempting to download the torrent for TBC but keeps getting errors with Bit Torrent. I've had him uninstall and reinstall and try several different things, but each time he tries it, Bit Torrent gives him an error. Any attempted downloads tell him that the client is already running and that he needs to close all instances of it and try again. Any thoughts on how to remedy this? Thanks!

Have him try bitport, it's a cloud based torrent service.

first things first, which BitTorrent icon did you click when you first downloaded it?