Windows Update KB5010342 fails to install Windows 10 version 21H1

Okay, see my last post.

Jaguwaar20 said:

Well, got the MSU downloaded in Firefox selecting "continue to http site"
After the install finished, the required re-boot ended with the same message as when made in WU "Couldn't install update Undoing changes"

Thanks for the update and sorry to hear it didn't work out.
Final stop, in-place repair upgrade I hope .......... sometimes other end up having to go down this path too ......... only M$ know why.

Hope that goes well for you. Standard disclaimer suggestion is to make a backup first. I've learned to make a MR backup before every Windows update.

Jaguwaar20 said:

Okay .. I have MR 8 to make a backup first and then hopefully a Repair with in-place upgrade will solve everything. And I was seriously considering upgrading to Win 11 this weekend. Not now anyway. Thanks for your guidance and patience

You're welcome.

I strongly suggest you make a MR backup before going to W11, just in case it makes you/your PC

Jaguwaar20 said:

@steve108,

one last thing on something that gets attention from different points of view. The Note in Step 2C in Repair Install Windows 10 with an In-place Upgrade leaves me scratching my head. Maybe whenever I read anywhere the words "You will need to", its maybe just me but the wording means from my interpretation 'must' 'without exceptions'

I've done I believe four Repair Installs with an In-Place Upgrade in Win10

What has never been clear is why temporarily disabling Secure Boot before an Win 10 upgrade is important

I disabled it maybe just once . . .possibly twice, if memory serves me correctly. The other instances when I didn't disable it, I didn't have Windows 10 become unbootable.

So is temporarily disabling secure boot really important ... or not ?

Hello,
I don't have any insight into this, so I would recommend disabling it. Of course if you have made a backup and you want to try with it enabled as it's worked for you before, you can do that.

You can also post a question in the tutorial thread asking the question.

Jaguwaar20 said:

you're right. Its probably better if I posted it in the tutorial. For my hardware configuration, it seems like its such an unimportant thing to have to do before a Win10 in-place upgrade and when downloading an ISO then mounted from a virtual drive

This is a good question, though - because if you can get the process started with secure boot enabled, it seems that you should only have to disable secure boot if you couldn't get it started with it enabled - so maybe the recommendation to disable it is to keep the tutorial simple and generic - I'm guessing.