problem in lauching the game

i just downloaded the game and is giving this error :Data/enGB/waw-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 the game in administrator mode. For more information, see: https://battle.net/suppoet/article/6910.

already tried in adiministrator mode

Close the game, then right-click the Mists of Pandaria folder in your Downloads (or wherever you have it) and uncheck the "Read-only" box. Click Apply, then ok. It should work now.

https://i.gyazo.com/9e02e6ad1370bf95...e47a3b55cc.png