No dvd drives



i started to install latest firmware to my sony 540a and in the middle of install the program quit responding,so itryed it again not realizing it was looking at my aopen1648 dvd,by the time i canceled it was to late. so if anyone could tell me how to fix my mess up it would be great. i have two dvd drives that don’t work and windows cant find them. im running vista



Test them both in another computer.