USB Optical Mouse Drivers???

I use a Dell USB Optical Mouse, M/N M-UVDEL1, with my Dimension 4700. The mouse doesn't seem to be working right. I can't find a CD for the mouse that came with the system, and when I check the Dell site for drivers in the Mouse and Keyboard section, it doesn't list any (for either Mouse or Keyboard). How should I find the driver for the mouse, or alternatively, how do I improve, or repair, the mouse behavior? Thanks.

Larry