Started Win7 Defragmentation, -analyze-. Result: 0%. Started Defraggler64, -analyze-,...19%!. Started Defraggler...64%!
Used Defraggler portable. PC has 2 drives, C is an SSD, NOT to be analyzed, just D, a HDD.
Thanks a lot for an explanation of these enigmatic results, ok, 64% could be left aside, because OS is 64 bit, perhaps just Defraggler64 is the correct tool?