Try this:
- Run WR's repairs #1, 2 (messed up permissions are always a pain in the ass), 3, 6 through 14, 16 through 27.
- Open "control panel", "Programs ........ ", "display updates" and try to manually remove this update. And then try to re-install the update. Post a reply whether or not this approach helped.
This procedure helped me ~ 4 times in the past ~ 2 years (updates & IE 11).