I currently have a VS Solution with 2 projects: a WPF application and a Windows Service.
Now, I have managed to get ClickOnce working in installing my WPF applicat
Please check DDay Update library it might give you ClickOnce stuff for updates, but first install you've got to do using another too.
Can you execute a process during the ClickOnce install? You might be able to write the service using Topshelf and then execute MyService.exe /install from ClickOnce.
I don't think you can deploy a windows service via ClickOnce in a normal fashion.
http://social.msdn.microsoft.com/Forums/en-US/winformssetup/thread/1bb64760-9622-4ca6-a1a6-3ce53e641f21
ClickOnce deploy a Windows Service?