Client Launch Error

When I attempt to launch the client I currently get this error "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" after about 2-3 minutes of waiting. Any way to fix this?

I understand that this post "http://forum.warmane.com/showthread.php?322688-Issue-with-MOP-client" is about the same thing, how ever the solution posted in the post doesn't load for me so I unfortunately need to create a new post and I apologise to the Moderators/Administrators for this.

Thank you in advance for any help provided it is very much appreciated.

ForgottenSatan

1) close your Torrent client and move your MoP folder away from your Torrent's download destination
2) now right click on MoP folder> Properties> remove "read-only"

Thank you very much for the fast and perfect response.