I am tempted to give you some advice but remember do so at your own risk. Windows rarely ever requires a driver for CD-Roms or DVD-Roms as it tends to use a generic driver to access the drive. If this DVD-Rom was working previously can you remember if you altered anything before it stopped working.
Here is the risky part.
1. Delete the drive from the Device Manager
2. Scan for hardware changes or reboot
If the drive is functioning Windows should redetect it and load the appropriate driver.