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Protection Center

Keep hackers and unwanted software at bay and learn about some quick ways to keep your PC secure.

Launch protection scan

How safe is your PC?
Use our free protection scan to check for and remove viruses, spyware, and other potentially unwanted software and to find vulnerabilities in your Internet connection. Learn more.

Already scanned? Use the tools and information below for more ways to help keep your PC safe.

 

Featured downloads

Windows XP Service Pack 2
Service Pack 2 (SP2) with Advanced Security Technologies will help you protect your PC against viruses, hackers, and worms.

Windows Defender
Help protect your PC from spyware and other potentially unwanted software with our new antispyware software.

Phishing Filter Add-in for MSN Search Toolbar (Beta)
This add-in for the MSN Search Toolbar (also free) offers access to a new online service that helps protect your personal information by warning you when you visit a phony website designed to steal valuable personal information.

Windows Live OneCare Family Safety (Beta)
Help keep your kids safer on the Internet, with rules you personalize, and get tools to help monitor what they're doing online.

Find more downloads

Top threats


Heard about a threat?
Note: Some threat information is available only in English.

 

Get continuous protection for your PC with Windows Live OneCare

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Download the new comprehensive, automatic, and self-updating PC care service that helps protect and maintain your PC. Download the free trial.