Instructions
Insert the "Fallout 3" installation DVD into your computer.
Right-click the Windows orb and click "Open Windows Explorer."
Click on your DVD drive and then double-click the "setup.exe" file on the DVD to launch the installation process.
Click through the license agreement and then type in the game license key contained in the DVD case.
Click "Install" to install the game to the default folder on your computer. The installation process can take 15 to 20 minutes depending on the speed of your computer. You're alerted when the installation process is complete.