So far i've burned 2 data dvd's using nero and neither are readable by my regular dvd-rom drive(pioneer dvd-120) but they read fine in the burner(optorite ddo405). I'm using 4x memorex dvd-r disks. The first disk I burned at 4x and the second I one at 2x, no difference. I also have a HP laptop with Teac dvd/cdrw drive and it cant read them either. Is there something i'm doing wrong or a setting that I may have missed? The dvd's have avi's on them if that makes a difference.