11.          Please update your virus software and virus definition frequently.

12.          Your password should be meaningless, otherwise some body may crack your password.

13.          Before opening a new file or e-mail, please use virus scans software to ensure that the file is safe.

14.           Please disable sutomatic processing of e-mail attachment in the e-mail software.

15.      Please backup your coomputer system and data frequently, it can help you to
          avoid data lost.