According to the screenie, the root of your woes is that Python itself can not be found. In start menu, right click on "My Computer", select "Properties" and click on the advanced tab:
you should see a variable called "PYTHONPATH" and the value should be the path to the directory you installed Python to. My guess is, you don't find it. So in the "System variables", click new and use "PYTHONPATH" as the variables name and the (full) path to your Python install without the trailing "\".
In your Python folder, there is a directory called "Lib". There is a folder "site-packages" inside it: is this where "PyFFI" is installed? if not, uninstall PyFFI, set your Python-path variable up as described above and re-install PyFFI using the windows installer: as it reads the environment variable when installing PyFFI, it should end up doing the right thing.
Good luck, soldier :gun: