Can't launch game..

I downloaded Mists of Pandaria and when i try to open the game (Wow.exe) it isn't working

When i open Task Manager it says that the game is launched, but it isn't opened anywhere.
After a while an error message pops up saying: "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."
Screen shot of full error: http://prntscr.com/j5m45h

I tried opening it in administrator mode but the same happens.

Please help. Thank you. :)

follow these steps:
1) Restart your PC
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".