You may delete anything in the World of Warcraft folder except these files and folders:
<Folder> Data
BackgroundDownloader.exe
Battle.net.dll
dbghelp.dll
DivxDecoder.dll
ijl15.dll
Launcher.exe
Microsoft.VC80.CRT.manifest
msvcr80.dll
Patch.html
Patch.txt
Repair.exe
Scan.dll
unicows.dll
Wow.exe
WowError.exe
That'll leave a barebones World of Warcraft installation. This will remove any addon saved variables files as well as screenshots, old patch installers and such. If you've used the online installer, you can open the World of Warcraft Installer shortcut on your desktop and delete the files inside. If you're on Windows Vista, you may delete the Blizzard Entertainment folder in C:\Users\Public\Documents\
Connect With Us