Pandaria Launching client error

[renard]

Hello.

I jsut downloaded the MoP client and I can't open it.
I get the following error:

Data//wow-update-base-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

I run the Wow.exe as administrator, but it won't open anyway.
I click the icon, have to wait around minute and then error pops out.

Can someone help me?

EDIT: The file which is listed as a problem gets a weird .lock copy when the client takes it time to launch and then displays an error. I have no idea what to do and even Google can't help me.

[skullatbash]

Close your Torrent Client and move your MoP folder away from your Torrent's download destination.
Then right click on MoP folder>Properties> remove "read-only"

[renard]

Hurray! It worked! thank you very much :)