Installation problem

[assasinos3]

Hey guys I downloaded Mist of Pandaria
And when I try to run it I get this problem. http://prntscr.com/bif716
Can you help me , please
PLEASE

[skullatbash]

nice photo, btw:
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"