Today I tried to start WoW , and this error screen appeared which said:

This application has encountered a critical arror:
ERROR #132 (0x85100084) Fatal exception!
Program D:World Of Warcraft – Mists Of Pandaria\WoW.exe
ProcessID:3748
Exception:0xC0000005 (ACCESS_VIOLATION) at 0023:007742A5
The Instruction at “007742A5” referenced mamory at “0x00000024”.
The Memory could not be “read”.
Press OK to terminate the application.

What should I do? Any suggestions?