How to Install Windows Defender XP
Windows Defender comes packaged with Windows Vista as the operating system's main security hub for combating spyware. An XP-compatible version is also supported, and can be downloaded for free by anyone running a genuine copy of Windows XP.
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Instructions
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Open your web browser and navigate to the Windows Defender download page (see Resources).
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Press the big "continue" button to let Microsoft check to see if you're running a genuine (i.e., not pirated) copy of Windows XP.
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3
Click "Download the Plugin" to download Microsoft's validation plug-in. After it has downloaded, open it, and click "Run" if you get a security warning. Click "Next" until a window pops up telling you the installation has been completed.
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Go back to the web page where you downloaded the plug-in. Scroll down and click the "Continue" button near the bottom of the page.
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Click the "Download" button on the page that pops up. Windows Defender will be downloaded to your computer.
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Double-click on Windows Defender to open it (and again click "Run" if you get a security warning). An Installation Wizard will pop up; follow the installation instructions in the Wizard and use all of the recommended settings.
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Click "Finish" when the installation is complete to allow Windows Defender to begin scanning your computer for malicious software.
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