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Security software: Downloads and trials

Download antivirus software, firewalls, spyware removal tools, and more to improve the security of your computer and to help keep it running smoothly.

From Microsoft

All-in-one PC care for people who have other things to think aboutAll-in-one PC care for people who have other things to think about

Learn how Windows Live OneCare Beta can help you keep your PC running at optimal performance and safe from viruses and spyware. Windows Live OneCare is a comprehensive PC care service that goes beyond security to take an integrated approach to help protect and care for your computer.

Free antispyware: Windows Defender (Beta 2)Free antispyware: Windows Defender (Beta 2)

Download our free antispyware software to help protect your PC from spyware and other potentially unwanted software.

Microsoft Windows XP Service Pack 2 (SP2)Microsoft Windows XP Service Pack 2 (SP2)

Get better protection against viruses, hackers, and worms. This service pack includes Windows Firewall, Pop-up Blocker for Internet Explorer, and the Windows Security Center.

Get software updates

Microsoft Update
Office Update

Get a free PC safety scan

Windows Live OneCare safety scannerWindows Live OneCare safety scanner

Block pop-up ads with Pop-up Guard

MSN ToolbarMSN Toolbar

From other companies

Microsoft is not responsible for the quality, performance, or reliability of third-party tools.

Antivirus software & firewall protection

Get special offers from the following software companies for antivirus and firewall packages.

Computer Associates

12-month free trial

F-Secure

6-month free trial

McAfee

90-day free trial

Panda Software

90-day free trial

Symantec (Norton)

90-day free trial

Trend Micro

90-day free trial

Antispyware

Windows Defender (Beta2)

No charge

Lavasoft Ad-Aware

No charge

Spybot Search & Destroy (S&D)

No charge

Important: Makers of spyware and other unwanted software might disguise their programs as antispyware tools. Click the links to the programs above or ask someone you trust to recommend a tool before you download and install it.


Important: Please uninstall any antivirus software you are currently using before installing a new product; having two different programs might cause problems on your computer.

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