Method 3 – Download And Install the Games for Windows Live Application
1. Download the installer for Games for Windows Live.
2. Once the installer has been successfully downloaded, navigate to the directory you saved it in and double-click on it to launch it.
3. Follow the onscreen instructions and go through the installation wizard, at the end of which Games for Windows Live will be installed on your computer.
4. Once the Games for Windows Live application has been installed, launch it.
5. Games for Windows Live will automatically download all the files Fallout 3 needs to run on your computer.
6. Once done, close Games for Windows Live and try launching Fallout 3.
Method 4 – Edit The Falloutprefs.ini File
1. Navigate to My Documents\My Games\Fallout3.
2. Locate a file titled falloutprefs.ini.
3. Open the falloutprefs.ini file and double-click on it to open it in a new instance of Notepad.
4. Locate
bUseThreadedAI=0
within the contents of the file and change the 0 to a 1. If you don’t see bUseThreadedAI=0 anywhere in the entirety of the file’s contents, simply add
bUseThreadedAI=1 in a new line within the file.
5. In a new line within the file, type iNumHWThreads=2.
6. Press Ctrl + S to save the changes you have made to the falloutprefs.ini file and close the instance of Notepad.
7. Run Fallout 3 and check to see whether or not the changes you made managed to get the job done.