WoW Launcher - Internal Error

[TrainingKimpas]

I am getting this error when I run the WoW launcher and let it update. (See below in screenshot) Tried deleting the new mpq update in the WoW folder thinking it would just be corrupted, no luck. I also use the 64-bit client.

http://imageshack.us/f/100/wowerrorq.png/

Sigh a new update more problems... can anyone assist.. Thanks

Update: Trying the new 64-bit file will post results.

Update 2: It worked; it was the new 64-bit files that I needed.

[Weektwo]

There was something on the front page about deleting 3 certain files. Had the same error, deleted them and now runs smooth.


*Edit:

If you are currently testing the 64-bit client, in order to patch up to 4.3.3 you will need to remove the 64-bit files to allow the patching process to complete. With the 64-bit client files in place you will receive the error: Blizzard Updater failed with an internal error.

Simply delete the 64-bit files listed below from the World of Warcraft folder, and the patching process will resume after going through a short repair process.

Windows
Battle.net-64.dll
MovieProxy.exe
WoW-64.exe

Mac
World of Warcraft-64.app

[Deleted]

Got same problem, but I'm not running 64-bit version. Any idea what to do?