Windows Live OneCare safety scanner is a free service designed to help ensure the health of your PC.

Download this free tool that checks computers running Windows Vista, Windows XP, Windows 2000, and Windows Server 2003.

They copy themselves without any action from you, and spread quickly, wreaking havoc on networks and contacts lists.

5 tips on how to prevent infection.

Find out how to use recovery tools to help remove unwanted software.

See details about Conficker, and how to use the Microsoft Malware Protection Center to keep informed about other worms or issues.

Diminish the impact of computer viruses with a little knowledge and prevention.

If something about your computer just isn't quite right, it might mean your computer is infected with a virus.

5 tips on how to prevent infection.

Find out how to use antivirus tools to help remove and prevent unwanted software.

Rogue security software might infect your machine with a virus.

Learn how to manage e-mail attachments in Outlook and Outlook Express to help prevent the spread of viruses.

Protect yourself when you use Smartphones, cell phones, handheld PCs, and other portable technology.

Watch out for files sent in IM. They could be viruses in disguise.

Protect your computer from malicious programs that criminals can use to control your computer through your Internet connection.

When online criminals take control of many computers at once, the resulting "botnets" can wreak havoc on the Internet.

Watch this video to find out how viruses and worms can infect your computer. Learn about the three main ways you can help to protect yourself from computer viruses.

Find information specific to the version of Windows on your computer.