I'm having trouble getting my Dell Optiplex GX280 to recognize USB flash drives, even though it did work on one time. Not sure what changed. The USB ports recognize when I plug in a flash drive, but I get an error, see attachments. The USB ports work fine for other devices, printers, etc. I tried plugging in a powered USB hub, then plugging the flash drive into that, but no change. See attached documents. Tried multiple flash drives, same resuilt.