>I have a Service developed in .NET and it needs no user to be logged in. The idea/purpose for the Service (for my need) is that it runs on the VM without anyone logged in. Maybe a Service based on the VFP .EXE is different though.

Services and Scheduled tasks use a Windows user account.
Jeff's suggestion to create a special user account just for the service is the best way to go.
No user need be logged in.