Take a screen shot of this message and take all the items to an Apple Store Genius bar. They should be able to diagnose the problem.
Have you attached other peripherals and if so has the same message appeared?
Anthony Acock wrote:
I have an external monitor attached to my laptop.
Well there it is there, power draw is a power draw.
What you can do is buy a powered USB hub and that will remedy your problem.
also do a SMC reset