If there really isn't an option to eliminate it, I wonder if it's an option you missed when you installed the software - which would mean the only cure would be a reinstall. What happens, when it appears, if you right click on it?
What is this software called? As NVidia does not install anything other the NVidia control panel and that does not pop up on the screen at boot. I have a GTX 670 so use Nvidia drivers myself.
Whatever it is it should have a stings menu and you should be able stop it there. Or you could uninstall it and get the latest drivers from here,NVidia. Which you should have done anyway because the drivers on the disk that came with your card will be way out of date.
I was confused because, although it was appearing at the start it wasn't showing in the Start Up section of msconfig. When I had looked in Add/Remove programmes the only entries I recognised were NVidia, which I was reluctant to remove unless I had to.
After reading your post I went back and found something called Asus GPU Tweak. I removed it and the monitor has gone.
I have never had anything like that before so, unless there is a good reason not to, I shall carry on without it.
You mentioned that I need to get the up to date drivers from the web.
I am still setting up the machine and it is not in a place where I can reach the router. However I would like to get the drivers: do you know of a place I can download them from which will give me the drivers in a file I can put on a usb stick?