Windows 11 Cumulative Update not downloading and installing.

uninstall .NET 4.8, that let mine update

That’s interesting. Let’s see if it works for others.

uninstall .NET 4.8, that let mine update

Thank you.

I contacted Microsoft Support like you did and they gave me all the instruction that I required to download Windows 11 and how to install it.

Everything is updated perfectly and it only took 1 1/4 hours.

Shortly after my post, I decided to see how the MS team responded directly. Using HELP, I contacted the MS person available to all of us (free of charge) who own a legal copy of Windows 11. She quickly fixed both my machines.

1. She began by downloading a MediaCreationToolW11:

Download Windows 11 (microsoft.com)

2. She launched it and opted for #3:

Download Windows 11 Disk Image (ISO)

3. She then opened the disk image and ran the installation program which limited itself to reinstalling all updates including the current one. There was a lengthy installation both before and during the reboot.
4. Reboot and run Windows update one last time.

NOTE: None of my apps were removed or lost their settings. No documents, etc. were removed.

Problem solved. It took about 3 hours. Installing all updates rather than simply reinstalling Windows seems to be much more machine intensive. If you try this, do so with care.

PS: Notice that this did not explain why the problem existed to begin with, nor am I convinced it won't occur again. If so, we can continue looking for common factors: I would prefer a quick update to a long, long repair.

I have the same problem with an HP laptop and have tried all the suggested remedies that I could find. I will do like you and sit on it for a while and hope that a fix will come along in a future update.