Windows Vista – Missing CD/DVD-Rom drive

A problem lot of people got after upgrading or installing Vista, i myself had this issue and got the solution from different forums. The one that work for me is as follows:

Follwoing key in the registry has the solution to this problem:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E965-E325-11­CE-BFC1-08002BE10318}

1. Click on the start menu.
2. If this is a Vista machine in the search box type in “regedit” without the quotation marks.
3. Maximize the HKEY_LOCAL_MACHINE and then go ahead and browse until you reach the key shown above.
4. In the right panel you’ll see “UpperFilter” and “LowerFilter”, you want to click on each “filter” key and hit delete. Click yes when it asks to confirm if you wish to delete the key.
5. Restart Windows.

And thats all the drives should show normally after your system starts up.