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, please place the installation DVD into your DVD-ROM drive. If your computer is AutoPlay-capable, a World of Warcraft: Wrath of the Lich King splash screen will appear. Select "Install Wrath of the Lich King" from the list and follow the on-screen instructions. If your computer is not AutoPlay-capable, if you are using Windows XP/2000, open the "My Computer" icon found on your desktop or in the menu reached by clicking your "Start" button. If you are using Windows Vista, go to the Start Menu and select "Computer". Then open the drive letter that corresponds to your DVD-ROM drive , double-click the "Install" icon, 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.