I'm having problems with my CD/DVD drive. It's disappeared from My Computer. It sometime comes back after repeated restarts but disappears again after a while. It's also not showing up in the Device Manager. I already tried Microsoft's Fixit. I also edited the registry by deleting upperfilter and lowerfilter. None of those solutions work. I tried to re-install the drivers but I can't do that because the CD/DVD drive is not showing up on the Device Manager. The drive is a Slimtype DVD A DS8A1H ATA Device. Can anyone help me?