Try this Draconian -
Go here in your computer
C:\Program Files\GIMP-2.0\lib\gimp\2.0
Look for these two folders
Image example (folders circled)
Open Interpreters first -
You will need notepad or notepad ++ to edit a file inside
Right click and open with Notepad ++ this file
You will see this line of code in the file
python=C:\Python26\pythonw.exe
/usr/bin/python=C:\Python26\pythonw.exe
:Python:E::py::python:
If you have Python installed in F drive change that here to reflect where you have it installed.
Now open the other folder environ
Open this file in Notepad ++
Look for this line of code
; PYTHONPATH=${gimp_plug_in_dir}/python
Make sure that is what it says (if it looks exactly like that
do not change it)
Save the files and restart Gimp.
If you still have Filters/Python-Fu/Console - open Filters/Render/Clouds/Fog and see if the dialog works.
If it doesn't open but it is present in the menus we need to add the correct path of your gimp/bin folder to your environment variables.So Gimp can find the bin DLL files and in turn find your plugins folder.
What is your system in this case? XP or 7 or what?