First I am going to list different types of malwares and threats:

                                                           SEVERE


VIRUSES: malicious programs that are created by a hacker to harm others computers



SPYWARE: malicious program used to read files in someone's computer



PHISHING:  the action to steal someone's identity by sending emails leading to password-seeking sites



SPAM: hacker sending thousands of junk email to somebody



VULNERABILITY: registery key that make someone's pc vulnerable to threats



                                                   INTERMEDIATE



MISSLEADING APPLICATION: fake security software that is used to make people belive that there is
threats on their computers to make them buy their products.


ADWARE:software that displays adds on somebody's computer



                                                           LOW



COOKIE:minimized version of spyware



JOKE PROGRAM:program used to scare people by making fake problems....does not harm computer



CYBERSQUATING: action used to decive people by aquering another website's name


                                        These are all the main types of threats