Django does not install correctly on windows machine
Well well ..I was just having the same problem..and the  problem was not related to any path variables.
The Problem was because of the default python viewer wingIDE. I had changed the default opening of python file from IDLE to wing IDE, this was the problem. 
To solve this ..

click any python file and open its properties and change the "opens with" to IDLE. This should solve the problem if you had installed django according to the instructions from django site. However, the path setting said above are must and inevitable.

...Cheers and happy coding!!
In my windows I'm able to install the django by running the python file setup.py install.
But after that, I'm unable to start a project by saying django-admin.py startproject newsite. All it gives me is opening a textfile showing the django-admin.py! 
Show me a way out guys