Right, to get to teh settings, follow these steps
Right click the desktop, and go to Properties.
Display Properties will then open up. Go to Settings.
Settings has all the resoloution settings, etc, and Advanced should be on the bottom right, which will lead you to the main video card settings
It should be somewhere in the Nvidia menus.
You must have been in the advnaced settings for example to check the antialising settings
Sorry I didn't explain better. I'm trying my best to help