Just moved my nu 15 to my new system. Problem i am having is that speed disk and disk doctor do not see any of my partitions on the internal 1tb seagate ata drive. So when i select optimize disk ther are no drives listed. If i plug an external usb goflex drive in it sees that device. i uninstalled / reinstalled several times. The drive is an ST31000524AS in a dell aw X51.