các thư mục dựa trên mạng với một bản sao cache của các tập tin. Khi người dùng đang làm việc từ máy tính của họ trong khi bị ngắt kết nối từ mạng, họ có thể tiếp tục làm việc với các bản sao cache củaVô hiệu hóa UAC thỏa hiệp hệ thống an ninh | 142 Chapter 3 Troubleshooting Post-Installation System Settings Figure 3-28 Validation Required message 4. This takes you to the Install The Genuine Windows Validation Component page. You will most likely need to close an information bar dialog box by clicking the Close button. 5. Click the message at the top of the page that says This website wants to install the following add-on Windows Genuine Advantage from Microsoft Corporation . If you trust the website and the add-on and want to install it click here . . Select the Install ActiveX Control option. 6. Click Continue in the User Account Control dialog box. 7. In the Internet Explorer Add-On Installer - Security Warning dialog box shown in Figure 3-29 click Install. This installs the Genuine Windows Validation Component Internet Explorer add-on. Figure 3-29 You are asked whether you want to install the software 8. The component is installed. After it has been installed the WGA check is performed. When this check succeeds you are taken to a page on Microsoft s website that allows you to download Windows Defender. Lesson 2 Configuring and Troubleshooting Windows Aero 143 Lesson Summary Before you try to troubleshoot Aero make sure that the edition of Windows Vista that you are using supports it. To support Aero a graphics adapter must be DirectX 9 capable have a WDDM driver have Hardware Pixel Shader 0 support support 32-bit color and have at least 64 MB of graphics memory. You can check whether Aero is running by pressing both the Windows and the Tab key at the same time. Setting Windows to use 16-bit color disables Aero. Windows Genuine Advantage checks allow you to download extra applications and operating system components if you have a genuine copy of Windows. The WGA check does not send your personal information to Microsoft. If your computer fails a WGA check you will be able to download from Windows Update only updates that are rated as critical by Microsoft. Updates that are rated as important or moderate
