And the newer Troubleshooting options never fix any of the Windows Update issues I come across.
I was fighting with this just last night. Ended up having to follow an official Microsoft guide on how to shrink my system partition by 250MB, remove the recovery partition and set up a new one with 250MB more space just so that windows update could actually install the newest update. Fortunately I enjoy dicking around with my computer and can afford to make a mistake that might trash my windows install but for others that rely on their machine this stuff has to be daunting and frustrating.