CD & DVD Drive Disappearing from Computer

This is a good start to have your computer try to find your CD & DVD drive that all of a sudden disappeared.
I highly Do Not recommend anyone to do this.
But if you asked and wanted to know. Then this will be hopefully the fix to correct the missing problem. In most cases this tip works. In other cases it's a little more complicated.
Remember to back up your current windows registry settings before you begin and if anything goes wrong make sure you have a nearest technician to go to.
The down side about messing up and editing your windows registry is that you will have to re-format your computer again and loose whatever information you had on it.
If you have windows XP try system restore before doing the registry edit.