I have a seagate back up plus I have been using with a 990fx extreme3 board both are about 6 weeks old. I shut it down and now the board wont recognize it in any usb 2.0 or 3.0. have the latest drivers installed and win 7 is updated. the hard drive works fine on 2 other win 7 computers and a win 8 computer. any help will be appreciated