Windows: Delete Service Using Registry

Reference:
https://www.itprotoday.com/compute-engines/how-do-i-delete-service

To delete a service that has not been automatically removed by a software uninstall you need to edit the registry:

1. Start the registry editor (regedit.exe)
2. Move to the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services key
3. Select the key of the service you want to delete
4. From the Edit menu select Delete
5. You will be prompted "Are you sure you want to delete this Key" click Yes
6. Exit the registry editor

There is also a utility that is supplied with the NT resource kit called INSTSRV.EXE that can be used to install and remove services

instsrv <service name> remove

Alternatively, also with the resource kit is a utility SRVINSTW.EXE that again installs and removes services, but with a GUI wizard format allowing you to select the service either locally or remotely.