How to use an already installed Python?

  python, windows

I have Plex installed on my PC, which relies on Python to run. I know nothing about Python, but I can see that it is running in Windows Task Manager. Now, I’ve got some other unrelated Python scripts that I need to run, but I have no idea how to find where Python is located on my system or how to access it.

According to How can I find where Python is installed on Windows?, I’m supposed to go to my Python interpreter to find out, but I have no idea what or where that is.

This is completely new to me. Could someone hold my hand and walk me through how I can run .py files?

Source: Windows Questions