In this chapter, we introduce you to the major concepts of computer
security and cover Windows Vista security features that allow you to do
the following:➟ Understand computer security and why you need it.
➟ Run periodic updates to Windows, which installs
security solutions and patches.(Essentially, patches fix
problems with the operating system.)➟ Enable a firewall,which is a security feature that
keeps your computer safe from outsiders and helps
you avoid several kinds of attacks on your data.➟ Work with Windows Defender, which is new in
Windows Vista. Windows Defender is a built-in solu-
tion for managing all your security settings centrally.➟ Set up Windows Defender to run automatically.
➟ Set up trusted Web sites so that Windows doesn’t dis-
play alerts when you try to go to those sites. Make set-
tings so that sites you trust are displayed and sites you
don’t trust are blocked.➟ Protect your network with an encryption key.
➟ Discover how to use cell phones more safely.
Understand Computer Security
When you buy a car, it has certain safety features built in. After you
drive it off the lot, you might find that the manufacturer slipped up
and either recalls your car or requests that you go to the dealer’s service
department to have a faulty part replaced. In addition, you need to
drive defensively to keep your car from being damaged in daily use.302