Windows-based computer Note the name of the file or program that you have downloaded. It is easier to find if you have the entire name, including the file extension. Go to your desktop. Right click on the "Start" button on the bottom left. Scroll to and select "Find" or "Search," depending on your version of Windows. Use the "Name" function in the dialog box that appears. Type in the entire name of the file that you downloaded, and click "Find Now" or "Search." You can also search by date with the "Date" tab or button. Enter the date you downloaded the file, and hit "Find Now" or "Search." Double-click on the file or program in the resulting list and it will open. Mac-based computer Note the name of the file or program that you have downloaded. It is easier to find if you have the entire name, including the file extension. Go to your desktop. Click on the "Spotlight" button in the top right corner of your Mac. Type in the name of the file and hit the "Enter" key on your keyboard. This will result in a list of instances of files on your Mac that match the file name. Once you find the file or program in that list, click on it and it will open. Browser-based solution Open the browser that you used to download the content or program. Some browsers, including Firefox, have functionality that lets you track where your downloads reside. Click "Tools" in the browser menu and scroll down to "Downloads" if it is available. Click on "Downloads." In Safari, go to "Window" and scroll down to downloads. Scroll through the list of downloads from the browser in the list that appears. Double-click the download.