Check below if you have Flash and a few other plugins correctly installed on your computer:
  

Note: The plugin report above will either say "true" (correctly installed) or "false" (not found) for each plugin. However, a false report could just mean that the code couldn't tell whether you have the plugin or not. For example, there's no way to detect QuickTime for Internet Explorer, so it will always be false even if you've installed the latest version.