Python 3.5.2-bit install SNAFU

[sparkz_alot]

Your right, it does become a bit more complex when multiple versions are installed and will take longer as you will need to look at each entry more closely.  You might try using "python3*" in both the File Manager and Registry.  It should shorten the list a bit.  It may not list all the "artifacts" but perhaps enough to allow a new installation.