title: PyGTK cannot find my python 2.7 folder on Windows
body: <p>I am trying to install Python 2.7 PyGTK 2.24.2 on a 64 bit win 7 PC. My python is 2.7.1 [MSC v.1500 64 bit (AMD64)]. </p>
  
  <p>I downloaded pygtk-all-in-one-2.24.2.win32-py2.7.msi from the PyGTK website, but when running it, there is a popup window: "Python 2.7 could not be located on your system." And the installation failed.</p>
  
  <p>Is it because my python is for x64? Or, do I have to setup any environment variable (which I already did for PYTHONPATH)?</p>
  
  <p>Thank you.</p>