Firstly, if you use Windows XP or below, use the package provided by Microsoft to update Windows Installer. If you're using Windows Vista or above, update Windows Installer through Windows Update. If you want to install Adobe Flash Player Standalone, download the installation package from an official source, launch it and follow the on-screen instructions. If you want to install Adobe Flash Flayer, navigate to Adobe Downloads page, identify your operating system if it is not automatically detected, click the yellow Install Now button, save the file to your computer and install the software following the on-screen instructions. If you still have issues, use the Need help? Start here to get support page to contact the support team.