Itunes won't start up. Don't get any error messages.

Question

I just installed the CD for Ipod/Itunes that came with my nano. When I plug the nano into the usb port, the "do not disconnect" display comes up and Itunes attempts to start. The Itunes user agreement pops up on the screen for a brief second, then goes away without initiating the program. If I double click on the Itunes icon, the same thing happens and I cannot get the program to open. When I try to open quick time, I get the same results.
My wife has used Itunes on and off for the past year on her RIO mp3 with no problems. I wonder if the napster and RIO manager programs are creating some sort of conflict. I do not want to delete them since my wife may need them for her RIO player.
I am very aggrevated that I cannot talk to a human to resolve this issue. I have called the "1 800" number several times and was told by a computer to "try back later". I wasn't even given the option to hold for a tech.
Any help is appreciated. Thanks.

Answer 1

when i click on it it gives me the hourglass for a couple of seconds then it goes away and itunes never opens.
... by any chance, do you have Norton Internet Security 2005 installed on that PC?
if so, let's try giving the trusty Lorraine M technique a whirl:
Lorraine M: NIS/itunes problem rectified