Your usb enclosure/chipset aren't playing nicely together.
Try using your internal burner instead.
My internal burner isnt working no more. Its broken Thats why i bought a new one. And got external cuz i can use this when i get new laptop at christmas
EDIT: Nd sorry about being impatient, i hav waisted about 10 disks cuz of differnet errors Getting fed up with it.
EDIT2: Gonna try once more. Back soon. Aint gonna touch the computer.