I tried to run Mists of Pandaria , but this shows up ...

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 permission for the World of Warcraft folder or try running the game in administrator mode.... What can i do ? I will be very thankful if you guys tell me ...
P.S. Oh , and running it in administrator mode does not work ...

1) close your Torrent client and move your MoP folder away from your Torrent's download destination
2) now right click on MoP folder> Properties> remove "read-only"