Can't launch the game

When i try to launch the game in administrator mode it opens a bar which 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

Can someone pls help me fix this problem?

Find your MoP folder, right klick on it, klick on properties and uncheck read only property