I have never had any problems burning DVDs. Then one time I kept getting the dreaded Power Calibration Error everytime I tried to burn an image on Nero. I simply chose to ignore the error and the DVD was backed up with no problems. I never got the error again after that. If any of you get the same problem just try doing what I did. That is just one of the ways in which I overcame the problem, though sometimes it can be a more severe case.