1. Return to the PC Security web page Lesson 5: Dealing with Malware

2. Lesson Objectives In this lesson, you will:  Identify different categories of malware  Describe the damage caused by malware  Prevent malware infections  Remove malware infections  Use System Restore 2

3. Defining Malware – Types Viruses Worms Trojan horses Toolbars Spyware Adware Homepage hijackers Dialers Keystroke loggers 3

4. 4 Understanding Infections Payload = damage  Payloads vary  Severe payloads may result in:  Permanent file deletion  Crashes  Identity theft

5. 5 Understanding Infections Becoming infected  Via email  Downloading infected files  Visiting a web page on an infected web server  Drive-by downloads

6. 6 Preventing Infection Keep Windows current Tighten Internet Explorer’s security settings Run antivirus and antispyware software Practice common sense

7. 7 Preventing Infection Antivirus software  Maintain updated virus definitions  To identify virus signatures  Install only one  Use one that supports heuristic scanning Antispyware software  Windows Defender

8. Removing Infections Virus scans Spyware scans Microsoft Malicious Software Removal Tool 8

9. Removing Infections Not all computer problems are caused by malware System Restore  Create restore points  Restore a computer to an earlier time  Must be an administrator 9

10. Return to the PC Security web page Lesson 5: Dealing with Malware