Delete a Service

Normally it should not be necessary to manually delete a service. Uninstalling an application should remove its associated service (if any).
However, should it be necessary to manually remove a service:
Run Regedit or regedt32.
Find the registry entry:
HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Services
Find the service there and delete it.You may wish to look at the keys and see what files the service was using and perhaps delete them also.
Note: You will have to reboot before the list gets updated in server manager