Are you trying it in USB 3.0 or 2.0?
Have you tried it in a different USB slot, if you are using the front USB's, try using the back ones. Is it still detecting the old mouse in the same slot?
Try removing all the software, reinstalling. Plugging in the mouse and then restarting your computer (don't use the restart on the tower, do it through windows). you're mouse won't be working so press the windows key to bring up the start bar and then navigate using the keyboard to restart it.