Inno Setup, developed by Jordan Russell and Martijn Laan, is a complimentary installer tailored for Windows applications, having made its debut in 1997. Over the years, it has evolved to compete with and often exceed many commercial installers in terms of features and reliability. It is compatible with every Windows version released since 2006, encompassing the latest iterations such as Windows 11 and Windows 10. Additionally, it offers substantial support for the installation of 64-bit applications specifically on the 64-bit editions of Windows, as well as accommodating x64, ARM64, and Itanium architectures. Users can choose between administrative and non-administrative installations, providing flexibility in deployment. Inno Setup also enables the creation of a single executable file for streamlined online distribution, and it supports disk spanning for larger installations. The installer is equipped with robust functionalities such as comparing file version information, replacing files currently in use, utilizing shared file counting, registering DLL/OCXs and type libraries, and facilitating font installations. Moreover, it allows for the creation of shortcuts in various locations, including the desktop and the start menu, enhancing user accessibility. This extensive array of features makes Inno Setup a popular choice among developers seeking a powerful and free installation solution.