PC Security

Security Updates

Stay up to date with security updates

• Check for security updates

• Latest security update bulletin - March 2011

  • February 2011

  • January 2011

  • December 2010

  • November 2010

  • October 2010

  • September 2010

  • August 2010 Out-of-band

  • August 2010

  • July 2010

  • June 2010

  • May 2010

  • April 2010

  • March 2010 Out-of-band

  • March 2010

  • February 2010

  • January 2010 Out-of-band

  • January 2010

• Security updates FAQ

Safety products and scans

Stay safer with security software and scans

Help prevent and remove malicious software

• Help protect your PC with Microsoft Security Essentials

• Malicious Software Removal Tool

• Get a free safety scan for Windows 7 and Windows Vista

• Complimentary Microsoft products help protect your computer from malware

• Security products and services: Frequently asked questions

• Protect yourself when you use ActiveX controls

Help prevent phishing scams and other fraud

• Security in Internet Explorer 8

• What is SmartScreen Filter?

• Internet Explorer 9: SmartScreen filter

Security by operating system and product

• Windows 7: Explore new and improved security features

• Security features in Windows Vista

• Security in Microsoft Office 2010

• Safety tips for using Windows gadgets

• Help secure computers remotely

Viruses and other malware

Help prevent and remove viruses, worms, and spyware

Most popular

• How to boost your malware defense and protect your PC

• Watch out for fake virus alerts

• How to restore your Internet Explorer home page and search page preferences

• Fix your hijacked web browser

Viruses, botnets, and worms

• What is a virus?

• How to avoid and remove computer viruses

• How to better protect your PC with botnet protection and avoid malware

• Help avoid instant message viruses

• How to remove computer worms

• Protect yourself from Conficker

Spyware

• What is spyware?

• How to prevent spyware?

• Spyware symptoms

• How to remove spyware

Malware protection

• Help protect your PC with Microsoft Security Essentials

• Malicious Software Removal Tool

• See if your Windows operating system has protection built in

• Free Microsoft products help protect your computer from malware

• Malware families cleaned by the Malicious Software Removal Tool

• Protect your computer from pirated software

Firewalls

Use a firewall to help protect your PC

• What is a firewall?

• How to choose a firewall

• Firewalls in versions of Windows