Hello, as it seems we're getting a new patchlette every day lately, I wrote a simple batch script to simplify updating the game client. This assumes you are using an enUS base install with Windows 7, connecting to a zhCN server.
Simply create a new text file in your World of Warcraft directory and name it update.bat
Run it whenever you need to update or repair your installation.
rmdir /s /q cache
rmdir /s /q C:\ProgramData\battle.net
::TIP - If you encounter issues initializing/updating uncomment the next two lines
"World of Warcraft Launcher.exe"
::Once the game is up to date close agent and press any key to continue
I decided not to mess with WTF\config.wtf for simplicity: You'll still need to set portal to CN manually.
Anyway, if anyone wants to verify that this works for them, too, that'd be great. Yeah.
Hope this is helpful!