This sounds like a Nero problem.  Have you tried to uninstall/install Nero lately?  If you, you need to go to 
http://www.nero.com/eng/downloads-cleantools.html to cleanout the registry entries.  Somewhere the registry is asking for a file that you no longer have.  YOu may not need it for the other applications, but the registry is trying to find it.
                
 sharon
                
 December 2007