(PS: Does only work at Windows xp/vista/7) - (if you dont have one of these I suggest you, to not try it)
First you have to do is to click at start at your desktop and click run or search "regedit"
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1. When you have opened regedit then you double click on HKEY LOCAL MACHINE so it opens
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3. Then you double click on CurrentControlSet so it opens.
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You shall be looking for ; {43D6E965-E325-11CE-BFC1-08002BE10318}
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When you have deleted your lowerclass and upperclass, then you have to restart your computer.
When your computer is starting again, then you can click on your Computer and you can see that you have your CD DRIVE visible.