Could be the illumination pulling too much power,try a powered USB hub.
dude i think i found the problem! I experimented with the usb plug of the keyboard at the back:https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcTobMdV2hmV4xQPz5v-A2GUmQvWL6XQzqHxTWiOX1t3iTA6Chaulw
I think this plug was causing the overcurrent cause everytime im using my PC and som1 accidentally bumps the CPU it restarts with the USB Overcurrent prompt. Our maid would push the CPU back against the wall when she cleans it, thus bending the USB plug. Now how do I fix the USB plug?? any suggestion??
P.S. I hanged the keyboard wire to a nail to counter act the bending somehow.