CD/DVD drives usually don't come with drivers, and you're probably getting this as a result of a registry error. Most of the time, I would suggest flashing the firmware, and getting the hardware up to date, but something tells me that that is not the problem. Uninstalling the drive, and then in most NT based registry's, deleting the upper and lower registry keys for the drive would allow you to gain access again. I'm not sure if this holds true in the W7 registry.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Class\{4D36E965-E325-11CE-BFC1-08002BE10318}

Look, I'm pretty drunk, and I think this is what you're looking for. Once you install W7, try this tweak, and see what happens.