The mother board of an old PC died. The partitioned hard drive was still okay. The hard drive had a "C: Windows" and a "D: Data" partition. I hooked it into a new PC and only the D: part shows up. I looked in Diskmgmt. It is also not there. I even hooked it direct into the SATA connection of the main drive and the other partition still does not show. I tried to attach a screen shot but only nonsense was inserted.