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Windows Defender

Windows Defender is your first line of defense against spyware and other unwanted software. And in Windows 7, it's easier to use, with simpler notifications, more scanning options, and less impact on your computer's performance.

A new feature called "Clean System" provides one-click purging of all suspicious software, and Windows Defender is now part of Action Center, the streamlined place for keeping your PC running smoothly.

Picture of Windows Defender
Windows Defender helps rid your PC of spyware.