Seems my laptop colluded with IT guys to fool me yesterday. Laptop selftested and reported ,"Hard Disk self test failure", and IT guys said, "You need send it to HP for hard disk repair. It may take long time and cost much, and your data may get lost ". Gosh! I begged, "Please try to re-install the XP operations system, maybe it works". "No, it can't help." claimed they.
I took it back to my home, and installed with a piratic XP. Yeh, it works. My data comes back.
What a foolish day!.