App isn't starting!!!

[stathislipknot]

Help me out a little.. I downoloaded Mist yesterday but the game isn't starting and it says... :

Data/enGB/wow-update-enGB-18273.MPQ: World of Warcraft can;t make a required change to an archive file.
Be sure you have write perimission for the World of Warcraft forder or try running the game in administrator mode.

I have allready tried to run the game in administrator mode but nothing changed..
I am using Windows 10 if this may help you to help me...

[Zelta]

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