Nostalrius Begins - Quality wow vanilla realm (1.12)

Hello,

So I keep getting this error and game keeps crashing. I dont know what to do. I cant play

Link to SS : http://puu.sh/gwXiW/122f0db7b4.png

I noticed this happens when I click on NPC but im not sure if thats the case every time.

update: game crashed when MOB killed me, game crashed 6 times now lol

Help

I get everytime i switch with tabulator to another mob a crash or if i get attacked or if i click at a mob!
i tried with the english client and the german client... only crashing!
maybe it will help to find the problem.... i use windows 8.1

pls help me <.<

Try running wow with compatibility settings. It could be that your directx is messing up somehow!

i always run wow like that.... it is crashing not that often but it crashs <.<