I have a wierd problem, pretty sure it's a hardware thing.
I have a plextor premium 167T which was working fine. Then I bought a Lite-On DVD-ROM drive, can't remember what model. I think after I installed that it worked fine.
Anyway now neither drive is detected by windows. When both are connected, the bios doesn't see them. If I connect only the premium, it is deteced by the bios but windows has a problem with the driver. "Windows cannot load the driver, corrupted or missing (code 39)"
I'm not sure what triggered the problem but now neither works. Its annoying.