My client open Outlook 2007 one day and error message told him the opened PST files are missing. He asked me check the PC I found the folder PST saved was totally vanished @@ I try several Data Recovery can't have good news until applied Power data. Power data recover some corrupted PST and after fixed them I can open them in Outlook but they are not my client's original PST files. Where are the lost PST files??? Any Virus can do it? Durint the deep scnning when I applied Data Recover tool I didn't see any dead sector. Have you heard of this strange story..???