Machine is a portable running Windows Vista Home edition and the device manager shows a yellow exclamation point beside the drive, noting error code 39: Windows cannot load the device driver for this hardware. The driver may be corrupted or missing.
The user advised that they believed the problem occurred when they had installed a Webcam (unsuccessfully as it happens).
Removing (uninstalling the device) and rescanning appeared to have no effect.
Solution
1. Click on START button, the click on RUN
2. Enter REGEDIT and press enter
3. When REGEDIT starts, open up the following folders
HKEY_LOCAL_MACHINE
SYSTEM
CurrentControlSet
Control
Class
{4D36E965-E325 -11CE-BFC1-08002BE10318}
4. After clicking on {4D36E965-E325 -11CE-BFC1-08002BE10318} you should see one or two settings on the right-hand side:
“Upperfilters”
“Lowerfilters”
Right Click on each of them, press DELETE and click YES
Reboot and check that the DVD drive is recognising a valid DVD disk – click on my computer and you will see at least a label for the disk.