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Tune Up Center

Like a car, your PC needs regular maintenance to help keep it in tip-top shape.

Launch tune up scan

Is your PC running at its best?
Use our free tune up scan to see if you should defragment your hard disk to help improve performance, and then let us do it for you. Learn more.

Already scanned? Learn more below about how you can optimize your PC's performance.

 

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.

Top threats

  1. Trojan:JS/Agent.FA
  2. Virus:Win32/Sality.AM
  3. Worm:Win32/Conficker.B

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

 

Microsoft Security Essentials

Get high-quality, hassle-free antivirus protection for your home PC now.

Microsoft Security Essentials provides real-time protection for your home PC that helps guard against viruses, spyware, and other malicious software. Download Microsoft Security Essentials.