I get this occasionally on computers that weren’t upgraded during the free Windows 10 period. Every time you go into the update screen, the first thing that pops up is an error regarding the Windows 10 upgrade failing. At first I thought this was a recent error, but t seems it is just a hang over from many months ago.
It is annoying, and difficult to find a solution for. This has worked for me a few times.
Open REGEDIT in administrator mode, and navigate to HKLM/software/microsoft/windows/currentversion/windowsupdate/ and delete the OSUPGRADE folder.
At your own risk, back up your registry before doing it etc.