Problem with start of WoW

Hey guys i just downloaded World of Warcraft MoP from your web-page and i have a problem with it. When i launch it its just show me that message "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. For more information, see: https://battle.net/support/article/6910". I tryed everything on battle.net page but still the same problem. Ty for help :)

Follow these steps:
1) Restart your PC
2) close your Torrent client and move your WoW folder away from your Torrent's download destination
3) now right click on WoW folder> Properties> remove "read-only".