We don't need this right now but it could be useful in the future, if
anything to detect if Elixir was installed using this installer.
Demo:
iex> {:ok, r} = :win32reg.open([:read])
iex> :win32reg.change_key(r, ~c"\\hklm\\software\\wow6432node\\elixir\\elixir")
iex> :win32reg.value(r, ~c"installroot")
{:ok, ~c"C:\\Program Files\\Elixir"}