Fatal Error #134 (Please Help)

Okay so I had to re download WOTLK on my wife's computer since my machine had some issues, and at a certain point my game crashes and I get a fatal error #134.
An example: On my draeni shaman when I try to go to the isle (the area after the starting area) I crash and get this message
"ERROR #134 (0x85100086) Fatal Condition
Program: C:\Users\Samantha\Desktop\World of Warcraft 3.3.5a (no install)\Wow.exe

Failed to read file creature\furbolg\furbolg.m2."

Can I fix this? It happens with every character I have, it is always a .m2 file that failes to read, what does this mean?
I need help Dx