No module named 'Tkinter'

[jdos]

First why don't you install v3.8? Second, if you have problems with the path, uninstall all versions, reboot, install new version.

When you start the installer be sure to check the auto path install.

After that locate your python (usually C:\Users\user\AppData\Local\Programs\Python\Python38-32\Scripts\) start cmd as administrator, cd to that folder and then run 'pip install tkinter' and all the other modules and libraries that you need.
Open IDLE and start coding.

And always remember, Capitalization matters. Tkinter is not tkinter for v3. 'label' is not 'Label' and tk.tk() is not tk.Tk(), that is to help you out of trouble. If you need help with the commands check TkDocs.

Cheers!