Well, I don't know if you'll see this, but here goes.... I have had really bad luck with both Memorex media and NEC drives. I would first try different media, (I've found media incompatibilities between 2 identical models of burners!) if it still won't finish it's the burner. NEC quality has really gone in the trash can in the past 2 years, the Nasdaq index threatened to de-list them (NEC) this week for shady business practices. Try a new Pioneer or Plextor.