Problems I encountered trying to install a WoW client

Hello everyone.
I have encountered a peculiar problem when I tried installing the client. The following error popped up on my screen:
ERROR #121 (0x85100079) Version Mismatch
Program: C:/User/Downloads/World of Warcraft 3.3.5a (no install)/Wow.exe

DBFilesClient/Achievement_Criteria.dbc has wrong number of columns (found 28, expected 31)

I tried to find a post here that can solve my problem but there are no answers to this problem.

Many thanks in advance!

In your torrent client, stop the torrent and force a recheck.

Did it. The error persists.

I am 99% sure your client was not downloaded correctly. Try to recheck the torrent, make sure your hard disk is not kaput, etc.

Did a search on your error this is what i got:

http://forum.warmane.com/showthread.php?t=309780

Maybe it will provide a solution for you.