There is as you can see from the google results, there is a program or function called application launcher, do you have that ?
If so it could be that it is trying to launch an application that is no longer there.
You could also check and see if there is an entry in the startup tab of MSConfig that is trying to start but the file/application no longer exists.
On occasion there is the Live Update, a symantec tool to keep symantec applications updated, this might still be present and looking for NAV.
Other than the above I don’t know exactly what it might be.
