I have the same model, firmware updates done. Try a DVD-RW, it will work, even with Memorex at 2x or 4x. I couldn't burn a single DVD-R from my 50-pile of Vio DVD-R (2x). I tried 1x 2x 4x and all software you can think of including Nero and Burn4Free, but nothing works, even when the computer is completely idle, with DMA activated on its own IDE cable alone. I think the kind of media (DVD disks) we use affects the machine performance in writing. Please if anyone knows good media for my DVD burner, post it here!