Over the years, people from all walks of life got familiar with the Microsoft Windows OS. The reason for that is simple; their focus lay on the standard definition of user friendliness. No matter what the task to be carried out using Windows was, it needed to be automated, wizard based, and intuitive with a beautiful user interface.
The same goes for software installations. We expect wizards and we expect to be able to go through the stages of an application's setup just by clicking Next, accepting the license agreement, filling out some text fields, browsing for the target location, and eventually ticking some checkboxes identifying what we really need. However, this last step is hidden under the name of advanced or expert mode. For the average user, the typical configuration should suffice.
Regardless of the application type and what purpose it's going to serve, most people would expect such an installation using Windows...