I got the download to finish finally, but, like every other user, I have no explanation for why. I just clicked download for probably the twelfth time and it arbitrarily worked.
The fact that Microsoft seems content to leave us with "keep trying and it might work" as the best course of action is pretty disappointing. What's worse is that my download also failed to install once the computer rebooted.
I have never seen this level of incompetence from any other company before. I couldn't even see the download without deleting some updates and reinstalling them, then the download continuously failed, and now it can't even boot when the download finally works.
This is the update that's supposed to fix Windows 8? It can't even begin to download or install itself correctly. I don't even care if it installs at this point, I have no faith it will be any better.