At the first glance it seems like you need to set the python path variable to your specific folder.
- Did you check if your machine has a python path variable?
- Did you try to reinstall pythonWin.?
- Did any other IDLE work?
For a detailed look see this question: Adding python path.
Short summing up:
- Right click on "My computer"
- Click "Properties"
- Click "Advanced system settings" in the side panel
- Click "Environment Variables"
- Check if the variable pythonpath is set and if not, add it with your path as argument
If this does not solve the problem try do the steps 1 to 4 and append the path of python to the Path variable, as described in the this answer
If I missed the point please let me know so I cant adjust my answer.