Cursor Disappears After Upgrading to Windows 8.1

One of our family friends came over tonight complaining of her cursor going missing after applying the Windows 8.1 upgrade to her new laptop. After a lot of fussing with it for 20 minutes and some google-fu I found this thread:

Which explains that for whatever reason toggling the trackpad disable button causes the cursor to re-appear and stay visible even when re-disabling it. Quite an irritating bug.