Eric is a very good IDE with many features and can be installed on Windows easily, although there are not many instructions on how to do so.

To install it on an Windows, download and run the Windows installer for PyQt from http://www.riverbankcomputing.co.uk/software/pyqt/download that matches your Python installation.

Leave all options checked when installing.  This will install Qt, QScintilla, and everything else needed to run Eric.

Then, download Eric, unpack it to where you want, and run install.py.  This will install Eric.

To run Eric, simply run eric4.bat