When your USB mouse is not working properly then you can also fix it problem by yourself if it not at hardware level. Some time due to the processing of the computer, mouse halts for some time. If your mouse is not working then plug out the mouse and then again plug in it in USB port. By performing this exercise your mouse will start working if you don't have hardware problem. If your USB mouse fall down and after that it will not work then you need to repair it from the shop or buy new one.