I would like to continue using this computer but it is beginning to show its age. The USB ports seem to be failing. The mouse that was connected to a port at the rear of the screen began freezing occasionally and then every time on startup. I plugged it into the other port on the rear of the screen with no success and then a port on the keyboard and it worked. Also, a USB hub that is plugged into the tower stopped working until I plugged the hub into an electrical outlet. The hub always worked before with no power assist. Any thoughts on possible solutions?