Windows 10 to 11, then rollback to 10 broke network printing

Solution 1:

I rolled it back to Windows 10, and now nothing I do will make the main printer work.

Short of reinstalling Windows and all software, does anyone have any possible solutions?

I would try a Windows 10 Repair Install first.

Go to the Media Creation Link:

https://www.microsoft.com/en-us/software-download/windows10

Windows 10 is running, so click on the Download button (not Upgrade Button) and select Run.

This will launch the Repair and proceed normally.

Begin with the option to Keep Everything as that normally works.

The remaining 2 options (Keep only Data and your user profile; and Keep Nothing including not keeping your user profile) are more aggressive.