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Unit 1: Introduction to Computer Security
Notes
Figure 1.1: List of some Common Antivirus Software
!
Caution If you already have an antivirus program, do not download another one, since
these programs may interfere with each other.
5. Install and Maintain a Firewall Program: A firewall protects your computer from
unwanted network intrusions by hackers or self-spreading worms that infiltrate your
computer through open network ports. Windows 7, Windows Vista, Windows XP and
Mac OS X have built-in firewalls.
Figure 1.2: Windows Firewall
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