Degraded RAID 1 array soon after install of microsoft USB keyboard, can't imagine why that would matter. Windows will not shut down or restart without using restart button or holding down turnoff button. SYSTEM seems confused like me! NVIdia mediashield tool shows two sets of arrays one healthy and the other degraded. When the RAID degrades does it automatically assign the healthy drive as the C drive. and how do I know which drive to replace in the box.