I have a Asus DRW-24B1LT DVD drive in Windows 7 64bit. The drive used to work fine for months and it stopped working suddenly and its driver letter is gone. In the device manager, there's a yellow exclamation mark beside the model name. I did several tries to uninstall the driver and do a scan for hardware changes and I get a message "Device driver software was unsuccessfully installed". When I do an update driver, it says the driver is current. I tried a different Sata port, but it's the same problem.
Asus's site has only a firmware to download. No driver. The DVD drive was installed by me. It didn't come with the system.
How to I troubleshoot this and get the drive to work properly again? Is there a tool to completely remove the drivers and do a "cleanup"?