An error was detected while verifying the contents of the file “D:\Program Files\World of Warcraft\Data\sound.MPQ”. There may be a problem with your system, or with the drive at D:\. You can attempt to install again. If this problem persists, please contact Blizzard Technical Support.

Hjálp
If this problem persists, please contact Blizzard Technical Support.
Virkar EKKI btw