Please help!! Anytime I plug something in my usb ports, the whole system freezes. It never used to do this but now it does it every time. My mouse is ok, doesnt seem to matter, but if I plug in my ipod, or mobile phone, or a memory stick, everything stops. I have to cold start the whole system. Even if I plug them in and then turn on my pc, it goes through the startup then freezes on the window progress bar, where the little thing shuttles back and forwards?? the shuttle freezes and nothing happens. So I have to unplug what ever it is that I have plugged in, and start up again. Then it goes ok. If I try to plug anything in after the computer is up and running, everything instantly freezes. This is so frustrating!! I am not very computer literate so if you could break it down to dummy language it would be great. Also it doesnt matter which usb I plug into, the ones in front of the pc or the ones in the back, same thing happens.