Things You'll Need
Instructions
Go to the "Start" menu, click "Control Panel" and then click "Uninstall a program." Select World of Warcraft from the list of installed programs and then click "Uninstall." Wait until the game is completely uninstalled to proceed.
Insert the World of Warcraft disc in the CD/DVD drive or mount the ISO image if you have one. The Setup window appears. Follow the instructions to reinstall the game.
Click "Cancel" when prompted to patch the game. Don't worry, you can patch the game manually to avoid the latest patches.
Download all 21 patches, from 3.0.1 to 3.3.5a. Navigate to "fileserve.com/file/fhZ9mVm", "fileserve.com/file/zaSsX8e" and "fileserve.com/file/QEfMx9q," and use the Slower Download option to download the three archives to your computer for free.
Extract all of the archives to a single folder to get all the patches in one place. Patches are named "WoW-X-to-Y-enUS-patch.exe," where "X" is the version you're patching from and "Y" is the version you're patching to. Patches must be applied in order.
Disconnect from the Internet. This is very important because some patches will attempt to connect to the Bizzard servers. Do not reconnect to the Internet until all the patches are installed.
Double-click the "WoW-3.0.1-to-3.0.2-enUS-patch.exe" to start installing the patch. The installer automatically locates your game and patches the right files. Install all of the patches and then restart your computer.
Reconnect to the Internet and start the game. If prompted to install additional patches, click "Cancel."