If the drive has any age on it, we try a couple of things.
1. First, remove the upper and lower filters entries in the registry.
2. If that doesn't help and because new DVD burners are inexpensive, we replace it with a new one.
Of course, if you happen to have a CD drive cleaner on hand, give it a shot.. If you don't have one around the place, don't buy one.. They're a little expensive and you might as well spend the money on the new drive.
Hope this helps.
My DVD drive(Sony dru-530a) will not recognize DVD's. It recognizes CD's. Any suggestions?