Can't start CMO--error, please help me

[Dimitris]

Are you able to perform an in-place re-installation of Windows? (keep apps & documents)

[BigBog]

I am not saying that you do it, but what would happen if you uninstall this update.

2026-KB5128925 Cumulative Update for .NET Framework 3.5, 4.8 and 4.8.1 for Windows 10 Version 22H2 on 10/13/2026

Would .NET go back to a previous version without this incompatibility with CMO?

Hey Nikel,
It may solve it, but not sure how to rollback/uninstall this.
I've been reluctant to think about screwing with .NET because I didn't want to break its functionality with other programs--
Let me know if you can give me easiest way to uninstall and rollback--

Thanks to all you guys helping--this is the toughest glitch I've ever seen!

BigBog

[BigBog]

Are you able to perform an in-place re-installation of Windows? (keep apps & documents)

I'd prefer not to have to do that, as I just had that done when I purchased an internal SSD to replace failing HDD.

The potential to screw everything up becomes really scary---

Roll back of .NET update is a possibility as Nikel suggested in previous post.

Thanks!
BigBog

[Nikel]

It is easy, the consequences I have no idea really

Settings...Windows update...View update history...Uninstall updates

A list should appear, just select it, right click and uninstall.

It nothing is solved you may reinstall it again.



Anyway I would have done this long ago, I prefer to play CMO than to have installed a .NET update like this even with all the security fixes it may include.

But it is up to you.

[BigBog]

Hi Nikel,
I looked at the updates and the update is listed there. Then when I click on button to "uninstall" updates, that update is not listed in the ones that are available to uninstall.....?

Not sure why some updates are not "uninstallable"?

Ya gotta love Windows---arghhhh

I'll see if there is a way around this--be in touch when I know more.

Abd yes, I'd rather play CMO than have these frickin silly updates all the time that break more than they fix--

[Nikel]

Is it hidden?

I have asked the AI, there is a way to uninstall it nevertheless.