I've seen this a bunch of times now, and haven't been able to solve it.
This seems to occur when a Win10 upgrade was scheduled through windows update, (seen it on Win7 and Win8) but for some reason failed. Windows Update still works good as gold when 'check for updates' is clicked, but every time it's opened fresh, that error is still there.
I've tried all the usual windows update reset stuff incl wiping out software distribution, but all the normal resets don't seem to remove that error. I'm sure that an upgrade install would, but as it doesn't actually cause any trouble, I've never gone that far.
Anyone else come across this and been able to sort it out easily?