The Paladin :
if your external drive/dvd is usb then what are searching for SATA settings in your Bios, I don't understand your problem.
if you plug a USB device and it is not recognized by windows, then please tell us the make model of the device your connecting.
some usb devices need a driver
some usb device need a powered port (have you tried to connect it to a different usb port to see if power comes on it)
I guess I don't understand it either. Let me restart
I have an LG GP50 external DVD writer that used to work a couple months ago. I go to use it today and nothing. Went and bought a new one (LG SP80, same deal, didn't work). Drive spins but never shows up on my computer devices/drives.
I did some troubleshooting searches, kept reading about BIOS and SATA and changing IDE to AHCI. I then wrote my question here when I looked in BIOS and, well, you read the original question.
Now I've done some more research/futzing and have now gone into Device Manager, see that it's listed (HL-DT-ST-DVDRAM GP50nB40 USB Device) and go thru the steps of updating the driver only to have my computer tell me that my driver is up to date. I then notice that I have a Code 19 error in the Properties Status box.
More research and I'm seeing a lot of people say I need to Uninstall the device, then go into the registry and delete the upper and lower filters. Tried to do that but there were no upper or lower filters.
So here I am, with a computer that will see the device but not run it or access the DVD located inside it. SO FRUSTRATING!