To download your free Thunderbirds Screen Saver, select the version and platform above that's right for you and follow these installation instructions:  Installation Instructions For Windows: After clicking on your selected screen saver, choose the directory where you want to save the file using the "Save As..." dialog box. Write down the name of the file you are downloading as it appears in the "Save As..." dialog box, or use the "Find" feature in Windows to locate the file for Step 3. After the download is complete, quit your browser and double-click the screen saver installation icon. Installation Instructions For Macintosh: After downloading your selected screen saver, disable any screen saver that is currently running on your computer. Quit your browser and double-click the screen saver installation icon.