I am having this issue of a disappeared dvd drive after installing Windows 7 alongside Vista.
At the time, the drive was working fine in Vista.
Now, it has vanished.
I have done the upper / lower filters registry fix - note I only ever had the upper filters anyway, there weren't any lower filters, but the drive isn't there.
In the BIOS it shows up in the boot order. But on boot up, when it lists the HDD it doesn't list the DVD drive, I think it should....?
In Windows (Vista & 7), it isn't in device manager or disk management. I have scanned for hardware / disk changes. The folder options are not set to hide empty drives.
I have reseated the drive and I have checked that it seems connected properly to the motherboard. If I put a disc in the drive the light comes on and the disc spins round. This leads me to believe it must be ok physically...?
I have also tried another working DVD drive in this laptop but get the same story.
Laptop is a 2 year old HP dv6000 (or dv6500 as it says on the back). There are no drivers on the HP site for a dvd drive, but I don't think this is a simple driver issue.
Thanks in advance for any help.
<edit> I should also add that I reinstalled Vista yesterday in the hope of getting it back, but that didn't change anything.
I found this info in the registry: MAT****A DVD-RAM UJ-861H ATA Device
Have just run Everest and it didn't detect an optical drive.