[SkyF]

Guest

Click the Start button, and then click Run.
In the Open box, type regedit, and click OK.
Add a new subkey named Parameters in the following registry location:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\
найдите название вашей службы и удалите ее ветку.

либо

опять же утилитка из Windows Resource Kit Tools
instsrv.exe MyService Remove


PS The Netsvc.exe and Instsrv.exe tools from the Resource Kit do not create a service on a remote computer. The Srvinstw.exe tool from the Resource Kit is a program that you use to create remote services, but it is not a command-line tool that you can use in a script.