A Service is described with an entriy in
HKLM\System\CurrentControlSet\Services. That's really just an implementation
detail though because usually the "right" way to find out about Services is
with the Service-related APIs.

Signature
Phil Wilson
[Microsoft MVP-Windows Installer]
Definitive Guide to Windows Installer
http://apress.com/book/bookDisplay.html?bID=280
> what exact registry entries does the installing of a .net windows service
> create? either with installutil or with a deployment project.