Doc:installation/py/win: add a section about adding Python to system PATH

hugo/content/installation/py/win.md

@@ -30,3 +30,18 @@ Note that the path to directory which includes the Python platform should be add
 On Windows, Anaconda is installed by default under `C:\Users\<username>\Anaconda3\` where `<username>` is the name of the current user account.
 Different Python versions are stored in sub-directories of Anaconda's root path;
 see the official Anaconda documentation for further details.
+
+#### Verifying system path
+
+Open “Environment Variables” window.
+To do that, type “environment variables” in the search box of the taskbar.
+
+{{< figscg src="/img/env_win_search.png" class="center" width="450px">}}
+
+In the “System variables” pane, click on “Path”, and then click on the “Edit...” button.
+
+{{< figscg src="/img/env_variables.png" class="center" width="450px">}}
+
+In the “Edit environment variable” window, check if the Python path is present.
+If not, click “New” button, add type the corresponding path.
+Click “OK” button to close the windows and save the Path.