After booting, the keyboard can not be used to windowsxp.
Users questions: On the keyboard numlock to off; capslock key and scrolllock keys are light, can not switch to normal (light stays lit). Off or not from the starting line, and then took the boot from the new interface, and occasionally available (on the keyboard numlock to on); into usb port Access is also often the same. Mouse no problem. I have the above phenomena and the same as yours. Will need to change keyboard?
Experts answer: may be bad NUMLOCK key issue, remove to clean the inside of the ash, all right. If the trouble, then change the keyboard on it, anyway, not expensive, and insurance, the He can solve problems related to the keyboard.