Well the problem occurs on one of my friends' computer. He burned 200+ cds with his burner however he faces some strange behavior of his device.He uses Nero. The burner starts burning and the led (Write) flashes 3 times then stops, the cpu usage of nero goes to %100, then led begins to flash again. That happens till the process ends. However most of the time the process fails and the cd really gets burned(burns out) The cpu usage is also at %100 on simulations and CD speed tests. Since nero doesn't need aspi layer(driver) that's not a driver problem. I fear its about the hardware but i wanted to hear some other ppl.