I have done some more testing and on a disc that I burned with Disc At Once, worked flawlessy, then had some errors, worked flawlessly, and it still has worked... I also burn at 4X just to make sure, but that is an odd error. For me, the CD's I burned faster 52X had a greater rate of the error message. It was always a different file... I am not sure what else you can do, except burn slower... because I cannot always replicate the issue. It has to do with the Laser, CD-R, or HD.... it is one of those variables that is causing it... You could try different CD-R's...