Ryszard...

For what it's worth... I had trouble with a dvd - r/w drive a while back. All of a sudden, for some reason Windows Explorer couldn't see it. And so it was off to the computer parts store to buy another one. Installed it and everything was fine - for a while. Suddenly I was in the same boat... WE couldn't see it. I opened up and just wiggled the wire going into it. After doing so, everything was fine. I changed the wire with a new one and everything's been fine since. Looks like I bought a new drive for nothing.

In all my years working with computers I have never seen a CD/DVD wire suddenly go bad. Oh well.

Bobby