When Download Insight cannot make a definitive decision about the safety of a file, it tells you what it knows about the file, makes a recommendation, and asks you to decide what to do with the file. If you are confident that it is a good file, you can allow the installation of the file. If you think that the download is unsafe, you can either stop the program from running or have the file completely removed from your computer.
You can change how frequently Download Insight asks for decisions from you by giving it default decisions in the Settings page.
Visit the File Insight tutorial to learn more about the file information shown at the Download Insight Window.