At least try this. whatever maximum speed the Verbatims are specified as, force the writer to write at half that speed (selectable in the writing software). Optical drives can be very fussy about the dye (eg, color/formulation) used for the media. I have four different DvD writers between all my computers and it is amazing how one can read a disk (even commercial) while another drive for some reason cant. In any event, when it comes to writing, reduced write speed (from maximum) has been found to be beneficial more often than not when there are writing problems. Sometimes it is just incompatibilities between drive and media, but sometimes I think that one may have media that is defective in the sense that its write speed capability is mis-specified (eg, not a true 8X or 16X capable write media).