"Your DVD/RW drive (Optiarc AD-5530A, made by Sony) is NOT shot.
I've been dealing with the same issue for the past two months.
After 2 hours on the telephone with Everex Tech Support all they offer is to replace the drive at MY expense.
After TWO sessions (totalling 6 hours) with Windows Vista support staff, including sharing control of my comp with technicians (in India, of course) it was determined that Sony/Optiarc has yet to develop an updated driver that will play well with Vista.
Try to find one...ROTSA-RUCK!"