Does the drive show up in Device Manager?
If it does, right click it, uninstall it and then re-boot the computer.
I have had that fix the problem.
If that doesn't fix it, you can Google "upper and lower filters"
You have to get into registry for that.
I've had my HP Pavillion dv6815nr for a few years. All is fine with Vista Home Premium. A couple of weeks ago, I watched a DVD and all was fine. On to other work -- I inserted a memory stick into my USB drive. The automatic HP ASSIST wanted to clean up the stick, and by accident I clicked YES. It really didn't change anything on the memory stick, but it removed the DVD from MY COMPUTER -- it's no longer there. At the same time, my RESTORE reset itself and I can't go back to before this data. When I insert a disc it just spins but doesn't play. I've checked all the drivers and related software -- all say they work fine. I just can't get the DVD to show up as part of MY COMPUTER and work. Needless to say,I cannot use my restore discs to remedy this problem. IF anyone has any insghts or ideas, I would very much appreciate any help you may offer. Thank you.