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Một số chương trình Windows Live Essentials đòi hỏi một Windows Live ID để sử dụng các tính năng nhất định. Sau khi cài đặt phần mềm, chương trình sẽ cung cấp cho bạn cơ hội để đăng ký một. | w Chapter 9 Safeguarding Your Computer constantly discovering new threats and these updates allow the program to detect and deal with these new threats. 6. Select Run a scan only when system is idle. The scan can slow down your computer so this setting minimizes the effect on your computer by running it only when the computer is on but you are not actively using it. 7. Click the other options in the left column to see other settings you can configure. You may not need to change or set any other options for now for most people the default settings are OK. If you want Windows Defender to notify you of issues but not take any actions without your approval you can change that in Default actions. 8. Click Save when you are done changing options. AdvancED The first time you turn on and use Windows Defender it is a good idea to run a full scan. A full scan takes several hours so be sure when you start the scan that you can leave your computer on for as long as Windows Defender needs to complete it. That may mean leaving your computer on overnight when nobody is using it. If you leave your computer on but unattended you can lock the computer by pressing Windows L. Also if you re leaving your computer in an idle state while the scan is running make sure that in the Control Panel item Power Options the settings for Put the computer to sleep are set to as long as possible or Never. You can access these settings by typing change when the computer sleeps in the Start menu s search box. 319 To scan your computer for spyware follow these steps 1. In Windows Defender click Home. 2. Click the arrow next to Scan and select Full Scan as shown in Figure 9-23. Figure 9-23. If you ve never run a scan with Windows Defender or have not run one for quite awhile run a Full scan. 3. When the scan is complete a summary is displayed similar to Figure 9-24. 320 Figure 9-24. The larger the hard drive the longer it will take the scan to complete. A full scan takes much longer than a quick scan. .