I cant start MOP.

I downloaded WOW MOP and when i dubleckick it it doesnt open.Instead a mesage pops up and this is what 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 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.
And i tryed to run it as an administrator and it still does this.

follow this steps:
1) Restart your PC ( this is important)
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"