Services are added from the Command Prompt. You need to know the actual service name as opposed to what Microsoft calls the Display Name. For example, if you wanted to create or delete the Help and Support service, the name used at the Command Prompt would be “helpsvc” rather than the Display Name of “Help and Support”. The actual service name can be obtained by typing services.msc in Run on the Start Menu and then double clicking the Display Name of the service.
To Create Service
Start > Run > cmd after enter
C:\Documents and Settings\yourcomputername>sc create service_name
Reboot the system
To Delete Service
Start > Run > cmd after enter
C:\Documents and Settings\yourcomputername>sc delete service_name
Reboot the system
If you prefer to work in the registry rather than through the command prompt to delete services.
Start > Run > cmd after enter
Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services
Scroll down the left pane, locate the service name, right click it and select Delete.
Reboot the system.