Windows Defender: Protect your PC

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. It features Real-Time Protection, a monitoring system that recommends actions against spyware when it's detected and minimizes interruptions and helps you stay productive. Now with 2 free support incidents for Windows XP and Windows Server 2003.

Windows Defender (Beta 2) expired December 31

Don't go a moment unprotected: Upgrade now to the final release of Windows Defender.

Get started using Windows Defender

Learn how to use Windows Defender, how to tell if you might have spyware on your computer, and more.

Internet Explorer 7 for Windows XP is available now

Internet Explorer works with Windows Defender to help prevent spyware from sneaking onto your computer in common ways, such as part of a larger software download.

	What is spyware?
	Spyware video
	Quiz: Test your spyware knowledge
	Microsoft's spyware strategy