Try using the Script Reset. Not actually sure what this will do so use at your own risk. https://gallery.technet.microsoft.com/scriptcenter/Reset-Windows-Update-Agent-d824badc . There is also other ways to fix Windows Update and this site may be of help https://www.bleepingcomputer.com/news/microsoft/how-to-fix-windows-update-problems-in-windows-10/. There was other ways to doing it as well but I can't find any information on that and I guess do to the fixes at the last link they no longer need to be done.
Manually stopping and restarting the service as suggested messed up WU. Everyone who did it will probably have the same issue.
I set Windows Update Service to Automatic (it was manual), restarted it, and that got the WU to download and install the .net update. The computer then slept. Of course the .net update was not available on every computer even though all computers run the same version of Windows 10.