answer: #Person1# can't log on the Internet and asks Neil for help. Neil's surprised #Person1# doesn't have any anti-virus software.
documents: #Person1#: Could you come and help me mend the computer, Neel?
  #Person2#: What's wrong with it?
  #Person1#: I can't log on the internet again.
  #Person2#: Let me see. Did you change anything on your computer?
  #Person1#: No, never.
  #Person2#: What kind of anti-virus software do you use?
  #Person1#: I don't have this kind of software.
  #Person2#: Are you riding? You have to install an anti-virus software on your computer. If not, you will be attacked by viruses, and it can lead your computer into failure.