Using following command we can delete a service
SC delete <Service_Name>
If we are getting error as below
[SC] DeleteService FAILED 1072:
The specified service has been marked for deletion.
We can still kill the service using "taskkill" command
sc queryex <SERVICE_NAME>taskkill /pid <SERVICE_PID> /f
Then you'll get some info. A PID number will show.
Where /f is to force stop.
Now you can install or launch your service.
