I have a laptop that runs TH1, and the latest update does almost the same thing.
I have been done almost everything including all of the above..and updating still fails.
Every time the laptop restart, it comes with a error and roll back the update..
My guess is that we have to wait for a fix or a new cumulative update.
The update that has some problems is:
KB3200970 if your running Build 14393.447
KB3198586 if your running Build 10586.679
KB3198585 if your running Build 10240.17190