If you have the Beta version of World of Warcraft: Wrath of the Lich King Installed on your computer, please uninstall it before attempting to install the retail version.
To install World of Warcraft: Wrath of the Lich King, place the installation DVD into your DVD-ROM drive. Once the DVD has mounted on your desktop, open the DVD and double-click on the World of Warcraft: Wrath of the Lich King Installer icon. Select "Install Wrath of the Lich King" from the list and follow the on-screen instructions.
* Please make sure you have 12 gigabytes of free space on your hard drive.
Note: If you are having a problem installing World of Warcraft: Wrath of the Lich King, please check our section on Troubleshooting Installation Problems.