Dell Latitude E6430 ships with Alps touchpad. For some reason this touchpad uses an obscure OSX inverted two-finger scrolling, which is counter-intuitive - at least for me anyway.

The fix is, on the other hand, easy. Simply change InvertScrollFlag value from "3" to "0" in the following registry key: HKEY_CURRENT_USER\software\Alps\Apoint

The bad news is that you need to apply this fix for all users, as this cannot be changed across all users... Only "current user".