I don't know if this is the right place to post/ask this, but I'll do it here because I don't know where else I could put it.Anyway, I just downloaded MoP and when I try to open the game I get this message http://prntscr.com/g9bdk3 I think I had something similar happen to me some time ago but I don't remember what I did to fix it.Any help is appreaciated, like what to do to fix it or where is to correct place to post this topic.
What Halta said. Usually does it for me. I also make sure to put the Wow folder on my desktop, not in the torrent/download folder. And restarting your computer after any changes.