The error NET HELPMSG 3774 means the following:
"The user was successfully created but could not be added to the USERS local group."
Run lusrmgr.msc
Click "Users"
Double-click Jon2
Click "Member of"
Add:
"Administrators"
"HomeUsers"
"Users"
See screenshot https://imgur.com/a/VhUIJuF
Also, does the original account work correctly after the clean boot?
If nothing helps, create a Windows 10 USB setup disk from another computer. Connect the USB disk to the subject computer and boot from it. Do a custom installation.
How to: Perform a Custom Installation of Windows 11 and Windows 10 or - Microsoft Community *"*One of the benefits of performing a Custom Install, your Windows installation can be archived. After setup is complete, you can recover personal files and application data from the Windows.old folder."