A reader asks:


Is Windows Defender built into Windows Live OneCare? Or do I have to download Windows Defender separately?


Windows Defender is built into Windows Live OneCare. If you use Windows Live OneCare, you do not have to download Windows Defender.


What is Windows Defender?

Windows Defender is a free program that helps protect your computer against pop-ups, slow performance, and security threats caused by spyware and other unwanted software. For more information, see Windows Defender: Spyware protection for free.


What is Windows Live OneCare?

Windows Live OneCare is a comprehensive service that helps protect your computer from many different kinds of threats. It also helps you back up your important documents in case of emergency and runs regular tune-ups to help your computer run smoothly. For more information, see 5 Reasons to use Windows Live OneCare to help protect your computer.


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