Usb mouse

here is what you can try,

1. try to connect the usb mouse in the other usb ports to check if it works
2. try another usb mouse.

if the usb mouse works in other ports and not in some of them...USB ports gone bad.
if it does not work anywhere, the mouse has gone bad. also to check the usb ports check if keybaord works or not. if yes..its just the mouse. it cost approximately $10. go and get a new one.