Error 80240020 when upgrading from Windows 7 to Windows 10

We have five clients who all have this same issue, and I've been beating my head over this for the past five hours, and could really use some help. Essentially, they have all done the same thing. They have accidentally told the computer to upgrade to Windows 10 and they told the system to stop downloading it, as they are happy with Windows 7. As of now, none of our clients running Windows 8.1 have gotten this error. This is a screenshot of the update history:

Update History
Here is a screenshot of information on the "Upgrade to Windows 10 Pro" failure:

Upgrade to Windows 10 Pro Error
When you boot the computer, it asks you to reboot in either 15 minutes, 1 hour, or 4 hours. Under Windows Update, it also says "Restart your computer to install important updates", and won't let you check for more updates. If you reboot, it pretty much does a normal reboot with no updating, and once you boot it up again, it will do exactly the same thing in both Windows Update, and the update prompt.

I have already tried deleting all files from C:\Windows\SoftwareDistribution\Downloads, and then opening an elevated command prompt and entering wuauclt.exe /updatenow to no avail.

Does anybody have any suggestions? I have searched google, and that's pretty much what everybody has said to do. If it is necessary, some of the systems we could update to Windows 10, however the clients would really like to stay on Windows 7 if possible. Any help would be greatly appreciated. Thank you very much in advance!
Jason KidmanIT Consultant & CEOAsked:
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Scott CSenior EngineerCommented:
Try removing KB3035583 - This update enables additional capabilities for Windows Update notifications in Windows 8.1 and Windows 7 SP1

And if you can remove it, the next time it comes up "HIDE" it before it gets applied again.

That will stop the Windows 10 notifications from popping up.
Jason KidmanIT Consultant & CEOAuthor Commented:
Thanks for your quick response! Unfortunately that didn't do anything. Over the course of the day, These are the updates that I have removed from my system:


And none of them have seemed to really do anything. We've pretty much got the notification of it under control, but the major issue is that I am unable to install any other updates, nor am I able to manually check for new updates.
JohnBusiness Consultant (Owner)Commented:
If you reserved the update and removing the updates you did, you may have to live with the errors.

On one problem machine, run Updates and hide the Windows 10 update. Does that work?

I have a Windows 7 system here that I did not reserve and it is updating fine. Can you restore to a point prior to all the Windows 10 activity.

On another system, try allowing the Windows 10 update to occur. If it works, this might be a way forward. I am using Windows 10 myself.
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Jason KidmanIT Consultant & CEOAuthor Commented:
I am unable to run any Updates. The only option whatsoever that Windows Update gives me is to restart now. If I try to run any other updates or check for updates, it says that I need to restart to install the current update first

As for a restore point, I am stupid and didn't make one earlier haha. Lesson learned.

I myself like Windows 10. I'm running it on my work desktop, my laptop, and my home desktop. However, this is not about me. This is about five of my clients, who need guaranteed compatibility with various programs that are only officially compatible with Windows 7.
JohnBusiness Consultant (Owner)Commented:
You might try one to see what issues arise
Jason KidmanIT Consultant & CEOAuthor Commented:
I am unable to either update or cancel the update in any of the five machines. It's simply stuck where I am. It will not boot into the update, and will not cancel the update after rebooting.
JohnBusiness Consultant (Owner)Commented:
For one machine, open the link below (Microsoft link) and try to force the upgrade.

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Scott CSenior EngineerCommented:
If you are unable to force the upgrade, the only thing I can think to do is to wipe the machine and rebuild it as you don't have a restore point.
Yes, run a Repair Install.
Jason KidmanIT Consultant & CEOAuthor Commented:
Just as an update, our solution was just to install Windows 10 from an installation media.
Jason KidmanIT Consultant & CEOAuthor Commented:
I've requested that this question be closed as follows:

Accepted answer: 0 points for SOS_Support's comment #a40969444

for the following reason:

Not the ideal solution, but it did the job, I suppose.
JohnBusiness Consultant (Owner)Commented:
That is the solution (along with the link) that I gave you in http:#a40950994
Scott CSenior EngineerCommented:
My suggestion was the solution.  Wipe the machine and start from scratch.  Which was what the author did.
Jason KidmanIT Consultant & CEOAuthor Commented:
Not an ideal solution, however it got the job done. Thanks!
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