Trouble opening the game

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.

Thanks for reading,

Try:
http://i.imgur.com/5wWKUL6.gif

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.

Did you reinstall the game?