Hello again Claude :)
Very well done on getting that installed, excellent work!
I would like to explain the situation to you. Windows Update errors have two main reasons for failure. The first is those I call "root causes", and the second is those I call "damaged updates".
A root cause is some corruption somewhere, something which breaks Windows Update. But once we've fixed all the root causes, some updates, those updates which tried, then failed, to install, are, on occasions, left in a damaged state. There are no root cause corruptions remaining, so no new updates will be damaged, but those few still fail. Here, we download the standalone installer. That avoids the damaged state, and the updates install successfully. Future updates are unaffected.
On your machine, Tom and I have found and fixed some root causes. We have fixed all of them. When we test the remainder with the standalones, they install fine. This is very strong evidence that they are only caused by subsequent damage, not more undiscovered root causes.
However, I cannot be absolutely certain. I've looked and looked, and cannot see any reason why the problem should reoccur, but I cannot absolutely guarantee it. Therefore, what I suggest is that we install all the updates manually this time (I'll provide links tomorrow), and if it reoccurs, you can come back to this thread. I'm pretty sure they won't, but I've never had a thread quite like yours before, so it's impossible to be certain.
Richard