Please install the original driver disc that comes with the video card and see if it will auto update. If not do a search on the disc. Also, if by any chance you have a P5W DH Deluxe the unknown device maybe resolved by inserting the original cd from that MB. It will auto start and the "unknown device" will disappear. Again, that's if you have a P5W DH Deluxe and it's a MB related device.
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