Python2Path adds Python to the System PATH Environmental Variable.
It automatically removes all previous paths to Python, so it can also be used to update your PATH if you changed Python versions.
Download and run the software. You can get it HERE.
Enter either a valid Python version or a valid path to a Python installation.
If you have a version of Python installed at a custom location, its path will not automatically be detected. If you do not want that version of Python in your PATH, you will have to remove it manually.
The Python2Path uses the MIT license, available HERE.