How to install Ruby 1.8.6 and Ruby-GTK2 on Windows

I had to search quite a bit to find the easiest way to install Ruby and ruby-gtk2 on Windows. Here's what I found so far:

  1. Download and install the Ruby 1.8.6 "one click installer" for Windows:
  2. Download a Windows installer for ruby-gtk2: I found a link to ruby-gnome2-0.16.0-1-i386-mswin32.exe on the page (it does not seem to be updated but at least it works).
  3. Check if it works by following