answer: #Person2#'s computer crashed. #Person1# finds it was infected by a virus and #Person1# is going to install anti-virus software for #Person2#.
documents: #Person1#: What can I do?
  #Person2#: The system crashed when I was surfing on the internet.
  #Person1#: Did you go to any illegal website?
  #Person2#: No, But does that matter?
  #Person1#: Yes, your computer can be easily infected by virus if you do that.
  #Person2#: I see. I'd better never try.
  #Person1#: That's wise.
  #Person2#: Do you know what's wrong with my PC?
  #Person1#: One minute. Oh, yes, it was infected by a virus, and you had no antivirus software.
  #Person2#: Is anti-virus software necessary for a PC?
  #Person1#: Of course. You'd better learn something about it.
  #Person2#: I'm afraid yes. But what about the data I stored in the computer?
  #Person1#: Don't worry, it should have been protected automatically. And I take an anti-virus software with me. Do you want me to install it now?
  #Person2#: Yes, please. I'll really appreciate that.