Update to this thread: I’ve was able to run the command to register the echosrv.sys service on the guest os. In VisualDDK debugger options, I set the start command to sc start echosrv and the stop command to sc stop echosrv. This worked several times until I ended the debug session. Anytime after this when I tried to debug the driver, I got a message that state the named pipe was in use and if I had windbg open, I should close it. Is there a correct way to end/stop debugging so that the named pipe is not left open. Or, is there a way to close the pipe? Thanks!