First, slow down. You’re on Windows, which doesn’t come with Python by default. That means that, if you do have two versions on your machine, someone put them both there on purpose. It’s very common to have multiple versions installed (usually one for Python 2 and one for Python 3) because there are still some widespread uses of Python 2. The first thing you should do is come to a satisfactory answer for why you have both in order to ascertain that you don’t need both.
After you’ve verified that there’s not a purpose for having both, you should find out which one you’re using and delete the other. Python installations typically have everything in one folder, so you don’t need to do anything fancy to remove it.