Can't play, why?

So I have this problem that won't go away. I tried playing a while ago but this happened, I got frustrated and uninstalled MoP.
This is the error I get when I try to play MoP.

" 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 "

Please help me :)

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"