How to fix the "Error: The file "C:\Program Files\World of Warcraft beta\Updates\wow-0-16030-Win-final.MPQ" appears to be corrupt. You may need to download this file again." shown at the WoW: MoP beta Launcher.
This fix works for every Win-final.MPQ error of this sort (such as 16030, etc.)
Go to the Updates folder (for instance C:\Program Files\World of Warcraft\Updates) and try running again the Launcher.
That worked for me flawlessly.
If you still experience any problems you could right click the Launcher.exe and choose Run as Administrator.
If that doesn't helps you could try running the Repair.exe and deleting the Cache folder.
This fix works for every Win-final.MPQ error of this sort (such as 16030, etc.)
Go to the Updates folder (for instance C:\Program Files\World of Warcraft\Updates) and try running again the Launcher.
That worked for me flawlessly.
If you still experience any problems you could right click the Launcher.exe and choose Run as Administrator.
If that doesn't helps you could try running the Repair.exe and deleting the Cache folder.
It seems that it can happen with any patch, so do the same step as well. I just received the same error for the next build,
ERROR: The file "\World of Warcraft beta\Updates\wow-0-16030-Win-final.MPQ" appears to be corrupt. You may need to download this file again.
This tutorial works in any game-client language, but let's write it in one more:
(Russian/Русский)
Ошибка обновления для Launcher.
Ошибка "Внутренняя ошибка программы обновления. Пожалуйста, обратитесь в службу технической поддержки Blizzard."
Если загрузка прервалась, и при запуске Launcher окно
мигает и закрывается, либо появляется ошибка #134, попробуйте запустить
файл WoW-x.x.x.x-5.0.5.16xxxx-Updater.exe из папки \World of
Warcraft\Updates\
