There are thousands of available computer software programs out there, but most programs that are going to be installed on a Microsoft Windows-based computer are installed in the exact same way. Setup.exe is normally the install file that, when accessed, will launch the installation wizard and begin the program's setup.
Insert the installation disk of the the program you want to install, or download the software from the website.
Open the the folder that contains all the program's information, including the setup.exe file. In a download, it will be in one of three places. Either as a desktop icon, in a pop-up window called "Downloads" or in the "Downloads" folder, which is found in "My Documents." To open a CD, you must open "My Computer," then right-click the CD icon and click "Open." This will reveal all the files and folders contained in the CD.
Scroll through until you find setup.exe. It will most likely be in alphabetical order.
Double-click the setup.exe file. Once you do this, the computer will take a moment and the installation wizard will load. Follow the prompts to the wizard and this will complete the installation of setup.exe and its program.