The PC recognizes the drives (A CD-R and a DVD drive) at startup, but they're not in My Computer. (neither are any of the virtual drives). When I check any of the drives' properties in the device manager, it says: "Windows cannot load the device driver for this hardware. The driver may be corrupted or missing. (Code 39)"
then it says I have to check the troubleshooter, but none of it's advice (uninstall the drives, restart and isntall again) helps.

