Printing to the Edge

I am trying to print a picture that was downloaded of the internet and it is not printing to the edge of the paper. I am making a trifold brochure. I tried printing in Word and Powerpoint and still cannot get it to the edge. I am getting about aninch of white paper and when you are trying to print a professional document, that is a lot. I tried setting different size papers and no margins. Please help. I am running short on time.