Sorry if this is the wrong category but I need urgent help here. I'm on my son's pc right now because my mouse has stopped working on my own one. My daughter was using it yesterday then switched the pc off at the wall.(she's only 6) When I switched back on the mouse wouldn't work. I tried another mouse but to no avail. All I have is the arrow in the centre of the screen. When I go to control panel the mouse file is completely empty???? It's like it doesn't exist. I'd have thought if the PC was on and I plugged a new mouse in that windows would well me I needed new HW but nothing is happening. This is wierd. Help please.