Zac Greve added the comment:
It turns out that Windows Installer failed to remove the Python 3.4.1 installer
entry from the registry when I uninstalled that version previously. Deleting
the entry fixed the install.
Basically, Windows borked it.
--
resolution: -> fi
New submission from Zac Greve:
I am unable to install Python 3.4.2 amd64 on Windows as the installer exits
with an error stating that it cannot run a required program.
--
components: Windows
messages: 229465
nosy: Zac.Greve
priority: normal
severity: normal
status: open
title: Unable
