window service error

Run this script (Given by Phil Wilson).

Set servicelist= GetObject("winmgmts:").InstancesOf ("Win32_Service")
for each service in servicelist
    sname=lcase(service.name)
    If left(sname, 11) = "someservice" Then service.delete ' the internal name of your service. replace 11 by length of your service name
end if

This will solve your issue.

I will update my answer with references and more details.

[Update]
Search Google for "Service already exists, Phil Wilson" and you would get more details.
[/Update]