>SWAG - do your services depend on any other services, that may not have started yet at boot?
>
>What is different, either in how you start manually vs. automatic, or in the environment for those two different cases?

I think the service is allowed to start. But, once in the OnStart() event, it tries to execute some code and that code may not be compliant with the security. Basically, I am trying to get a file version from a file on the drive. Maybe this is not accepted in that mode.