I'm far from being a Windows guru, so feel free to correct me if I'm wrong, but I'm not sure services are what I'm talking about. I want to turn off the driver software that allows the OS to recognize and communicate with a USB device (actually a specific type of USB device, but that's probably not relevant). Is it possible that each device driver also has a service associated with it that? I've not seen that before. What I'm talking about is doing what you would normally do by hand by going to the System control panel, clicking on the 'Hardware' link and then drilling down to the details for the specific driver in question and then selecting 'disable' from the dropdown menu at the bottom of the window.