Mouse
General
A mouse is pointing device which selects and moves the item on the screen. The main goal of any mouse is to translate the motion of the hand into signals that the computer can use. It should not be connected in the same looking keyboard connector.
Troubleshooting
The pointer on the screen is not moved as the mouse is moved.
Clean up the mouse ball.
Check the cable is connected properly and not connected in the keyboard port. Reboot the system.
Open the device manager and check whether the driver for mouse is missing. Reinstall the driver.
Try this mouse on a working system.
Try the mouse from working system.