Jean, don't quote me on this as I'm far from an expert. As I understand it, cd/dvd cutters all use a standard microsoft driver (unlike your printer etc which has a custom written driver), so that they can be used to boot up from. ie the driver in windows will run any cd/dvd rom drive. So to update the software that runs them, they have an internal memory which can be upgraded. This is called flash memory. If you type your dvd writer and driver into google, you'll come across a programme to upgrade the 'firmware' as its called, in the dvd writer. easy to do, sounds complicated but isn't. But.... actually my problem isn't over. Because I did this and it then worked, I thought... problem solved. It seems that working was a one off abberation and I'm back to the sticking permanently at 99% cut. System doesn''t hang but no usable disk. I'm finding this very frustrating, as software that work once then never again but eats a fresh DVDr each time is the pits! Guy