My computer has two DVD Disk drives. One (the original) is a Sony NEC ND-6500A and the other is LITE-ON (unsure of the model number). I had some compatibility issues so I disabled the NEC drive, when I went to enable it this afternoon I accidentally did it via troubleshoot rather than the drop-down menu. This rather than enabling it now makes it appear as if it's unplugged, but it's not. How can I enable it again?