Helpp! exceeded the power limits on its hub port?

my camera works fine, but then when i plug the camera in with the USB cord, it says power surge on hub port, the device has exceeded the power limits on its hub port. click here for help..

so i click and it comes up with a screen that says disconnect your camera and press reset. when i do, nothing happens.
I pulled the USB cord, pressed reset and plugged it back in. Same problem over again. We then pulled every USB out, one at a time, pressed reset and put it back in. Never ever found the problem, but the Warning has stayed.