I had the above problem in W10 1809, meaning that Windows Update would not work. So I upgraded to 1903 in the hope that this would fix it, and for a time all was OK. The Update Orchestrator Service was running, and Windows Update was working correctly. But now I find that the service is once again disabled, and all its attributes are greyed out so it cannot be started. This remains the case even after a system restart. Without this service running, Windows Update will not work, so how can I recover the situation?
Windows 10 Pro 64 bit 20H2