If you need 32-bit Python on Windows my advice is to install 3.4. If you need 32-bit and 64-bit Python on Windows, then I think it will only work with 3.4 (or older), but not with 3.5's new installer.
I have tried installing 3.5.0 and 3.5.1 on several machines both 32- and 64-bit Windows. The 32-bit installer either doesn't work at all or won't work with two third-party packages I use: APSW and PyWin32. The 64-bit installer does seem to work on 64-bit machines, but in my particular case I need both 32- and 64-bit versions so use Python 3.4. Hopefully the problem will be fixed before 3.4's end of life:-) -- https://mail.python.org/mailman/listinfo/python-list
