and disable Windows Update, Update Orchestrator, and WaaSmedic if it's there.
Alternatively, do the same psexec but regedit instead of services, navigate to HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services, find those same services I listed above, change the Start value to 4 to disable. I went to the next step and neutered all the registry entries for each of those services to make sure they stayed dead.