This looks like a corrupted download to me - the update was aborted because none of the other packages were "found", which should be impossible since they are embedded in that executable. It may also be an antivirus program interfering though, as I'd expect a corrupt installer to fail earlier than this.

We definitely need to keep the update in there. If there's a superseding update already installed then we won't install it (or for the web installer even download it), and it may still be necessary for offline installs. As I said, it's not the issue here.