WotLK Game wont launch / dark screen

[Renpanz]

Just downloaded the WOTLK (not old) and tried launching it but I only got the intro to the expansion and a dark screen for one second until it alt-tabbed out on it's own. Am I missing some files?

[Renpanz]

Okay, I fixed the problem by restarting my pc. Now I find another problem. I am trying to change my settings for the display and after I press either apply or ok it literally breaks down, not letting me close the game or even act on my desktop as the game is not responding and taking charge of my desktop. The only way I can close the game is by restarting my pc AGAIN.

[NordicShade]

Guess I'm lil bit late but try this:
1) Restart your PC ( this is important)
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"