To Trust Free Software Programs, you have to check the system requirements for the program you want to install and compare them to your computer's hardware. To check your system, you need to click "Start," "Control Panel" and "System." After that, download the program. When on your computer, you must load your computer's antivirus software and select the downloaded file for a scan. You should wait for the antivirus program in order to finish scanning the software to determine whether it is safe to install. Then, Double-click the downloaded file to load the free software installation wizard. You can accept the end-user agreement and leave the installation name as well as location as is. You have to pick "Install" and the software installs onto the computer.