Windows Vista: Get antispyware software
Microsoft's antispyware software in Windows Vista, Windows Defender, helps prevent computer slow downs, privacy and data loss, and unwanted pop-up advertisements caused by spyware and other potentially unwanted software.
Windows Defender is part of Windows Vista. It features Real-Time Protection, a monitoring system that recommends actions against spyware when it's detected; and a new streamlined interface that minimizes interruptions and helps you stay productive.
To learn more, see Using Windows Defender.
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