Desktop USB port

My desktop has just stopped  recognising USB devices  connected to it. The devices are Optical mouse, printer Flashdisk. If the mouse is plugged it glows but the pointer on the screen does not move. There are no error messages. I am running windows XP.

Please help
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rindiConnect With a Mentor Commented:
Can you boot your system with a knoppix CD, then check whether the USB devices work there or not? If not, then your hardware is bad and you should either get the PC repaired (if there is still warranty on it), or get a PCI USB card and use that. These cards are cheap and you can get them in any PC store.
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