I have Windows 10 and use Opera as the Browser. I went to Adobe's site and downloaded Flash. I followed the instructions: To proceed, open your download folder and locate the Adobe Flash Player Installer file, named "flashplayer18pp_fa_install.exe”. Once it is in my downloads folder I Double-click on the exe file. It opens and begins installation but after several seconds the installation window gives a message "Failed to launch application" with a finish button and it closes. It also completely disappears from the Download folder.