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Antispyware: Windows XP SP2

To find out if you already have antispyware software, click Start, point to All Programs, and then look for Windows Defender or another popular security program like Symantec or McAfee that might have antispyware protection built-in.

You might also already have a stand-alone program like Lavasoft Ad-Aware or Spybot Search & Destroy.

Windows Defender, which is free from Microsoft, can help protect your computer from spyware and other potentially unwanted software. To download the program, visit the Microsoft Download Center. To learn more about it, see the Windows Defender Web site.

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