game runing and not

At first game worked i create character enter the game when i start changing setings, (all to ultra, and think last thing i clicked refrest rate 60 to 75mhz - not sure if that matter) next thing game switched me to desktop and i can see game running in taskbar and in taks menager when i activate it from taskbar or i clean start it is always the same all i see my deskpot and i can hear loging screen music and nothing more? any advice what to do?

Close WoW > Delete WTF Folder and get a new one from the torrent
Next time do not change settings ( Yes, I know it is not a great suggestion)

Thank you. Deleting WTF folder helped. I didnt had to replace it, aoutomaticy it created a new one.