I just did as you said, but with Nero CD/DVD-speed that came with Nero 7 Ultra. After burning for a minute or two it just hangs. CD/DVD-speed locks up after a couple more minutes, and when I take a screenshot and paste it into the picture prog and try to save it, the picture prog freezes, and so it continues.. it's pretty much the same every time I would guess is that the laser heads are blocked somehow, or something like that.. but I just managed to copy 2gb of data off of a disc containing 4gb before the whole system froze.. and my computer is usually stable as a rock.. :S