I'm trying to install Robot Framework, but it keeps giving me an error message during setup that "No Python installation found in the registry."  I've tried running the installer as administrator, I've made sure that Python is installed (I've tried both 2.7.2 and 2.7.9), and both C:\Python27 and C:\Python27\Scripts are added to the PATH (with and without slashes on the end, if that matters).
I have no idea why it can't find Python.  What do I need to do?
Try to add the following path in environment variable also:
"C:\Python27\Lib\site-packages"
Since this path consists all the third party modules installed on your PC and also verify if robot-framework library is present in this folder.
Robot Framework can't find Python