Windows Live OneCare Help Center
Windows Defender did not install
If you chose not to install Windows Defender, or if your computer fails the genuine Microsoft Windows XP verification during install, you will receive the following yellow action item:
"Install Windows Defender: Windows Defender is not installed. Install the Windows Defender antispyware technology to help protect your computer from spyware and other potentially unwanted software."
Windows Defender is only available to customers running genuine Microsoft Windows XP. The installation will validate your Microsoft Windows XP installation. For more information about genuine Microsoft Windows XP, see genuine Microsoft Windows XP FAQ.
To install Windows Defender, open Windows Live OneCare, and then click Install now.
If you do not have the Install now button in Windows Live OneCare, you can install Windows Defender from Microsoft Windows XP downloads. Please visit Windows Defender.
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