I did a upgrade on my computer from xp to xp pro, instead of the upgrade i did a new install and now my dvd bruner will not recongnize a blank disc (cd or dvd). When a blank disc is inserted the drive changes from a dvd to a cd driver, when looking at it through "my computer". It worked fine before I did this because I backed up alot of stuff on my computer, I have unstalled the software for the burner and reinstalled it, still won't work. Update all software and firmware also no help. I hope someone here can help me. I have been all over the net trying to find help.