Open ISS File
ISS files have several different usage types, namely:
Inno Setup
For Inno, the ISS file is a setup script.
Inno Setup is a free program used to create program installers for Windows.
The ISS file contains series of text commands that specify the installation files, target installation locations, and other settings.
In other words, the ISS file is used to control all aspects of the installation.
ISS files store all the information necessary to install a program in Windows.
Compiled programs are generated in an "Output" directory within the ISS scripts directory.
ISS files can be edited using the Inno Setup Compiler or any text editor.
InstallShield
In this section, and as in the previous application, the ISS file is a file used by InstallShield, a program used to create Windows installers.
The ISS file contains a series of installation configurations in a text format, and is used to present automatic responses during the software installation process so that users do not have to enter information in an installation wizard.