Today I got the 1923 error which says I don't have privilege to install services. I followed all the steps in the help pages
http://www.advancedinstaller.com/user-g ... rvice.html to add the SeServiceLogonRight to the custom user. But again the installation failed with the 1923 error. I verified that the checkbox at "Allow the service to interact with the desktop" was unchecked. But still no success.
Finally I found what the problem was: The installer tried to install a service that already existed on the system. You don't expect to get the 1923 "insufficient privilege" error when the service already exists.
The previous release of this service had been installed by hand, and now we are building an installer to upgrade this service. This first version of the installer for this service has of course no upgrade functionality, because it is unaware of the previously installed service. So we should have uninstalled the previous version of the service by hand before trying to install the next version of the service with an installer.
Lessons learned.