Here is what happens.
I bought recently a Dell T30 Server and installed Win 8 on it, then attached (connected) the HDD from my old computer to the Dell Via Sata.....
At this time the HDD "crashed" and I wasn't able access thru window.
Still using the Dell, I recovered with cmd prompt all the data to an external drive. But only files older than 6 months were playable and not the recent ones.
I put back the HDD in the old computer (desktop i3) and did same recovery via cmd prompt, at this time all the files were recovered and playable, no damage!!
I'm thinking this might be operating or software issue, since Dell servers need Windows Server 2008 and up.
Anyway I could recover all, but after a stressful week end.
Thanks Jared for taking a look on my post and your help.