Mouse speed out of control

I've got 8.1 on a Dell Inspirion 5738 laptop, I have a generic usb mouse attached. My problem is the mouse pointer slowly starts speeding up until it gets so fast I have no accuracy. I mean I move my pinky and the cursor moves from one side of the 17" screen to the other. I go in Control Panel>Mouse>Pointer Options> and set the speed to a slower speed. At this point I only have one more notch to go down, and it's still a little faster than I want it. How do I control the speed, you know, how do I keep it from speeding up? Is there a way to keep it a set speed other than the above mentioned procedure?