As in all my other posts, ill make it short (see Bob? SHORT!)
1 - Find the shortcut or any icon that you use to start WoW.
2 - Test click it. if it goes streigh to the game, you dont need this. if it goes to that "louch" box and starts updating, close that and keep reading here.
3 - With the "louch" box closed, right click the icon you used to open wow.
4 - go to "Properties" and find "Destiny" once a little page opens.
5 - in that "Destiny" clausure, there will be a big text. at the end of it, you should see (if the louch box opend before): " \Launcher.exe" "
6 - Erase ONLY "loucher" and type in "wow".
7 - There should or not apear a new icon. If yes, click the new one. If not, click the older one because that one will be modified (it depends on what operating system you are)
8 - Log-in and play!