I had the same problem--on a system more powerful than yours.
What is your Windows Experience Index score for graphics?? Is it 1.0, by any chance?
Look in device manager under "display adapters". What do you see?
I saw "Standard VGA".
My slow video response disappeared when I installed "Intel HD Graphics", and that is what I now see in Device Manager. My graphics score moved up to 5.5.
So, you should check your video drivers
and make sure you actually have and are using the right one for that GeForce card.