First, navigate to the official web page, click the Install Now button and save the file to your computer. After that, close the browser navigate to the installation package and launch the installer. After the installation process is complete, open Internet Explorer and click Manage add-ons from the Tools menu. Locate Shockwave Flash Object or Adobe Flash Player in the Toolbars and Extensions section, select it and click the Enable button from the right corner. If you still have issues, check the troubleshooting guides provided by Adobe.