The Windows installer gives a choice of two install locations, for all users and for the current user; the latter does not require admin rights.  

It lists optional components, giving the size of each:
- Register Extensions 2kb
- Tcl/Tk 13mb (includes IDLE)
- Documentation 5Mb
- Utility Scripts 632kb
- Test Suite 9.7Mb.  
The default is to install all of those.

The installer removes any previous versions before installing (including wiping their __pycache__ directories).

With the full install, the listing in All Programs (the windows parallel to the Application Folder) includes five entries:
- IDLE (gui)
- Module Docs (via pydoc)
- Python (command-line terminal)
- Python Manuals (points to a chm file)
- Uninstall Python.

In addition to what is offered on Windows, I think there should be an addition entry in the Application Folder for running the test suite so that some one can validate their install without going to the command-line.