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Microsoft Windows Defender (64-bit)

By Microsoft Free Editors' Rating
This product requires Windows validation. The Download Now link will take you to the Microsoft site for downloading.

Windows Defender is a free program that helps you stay productive by protecting your computer against pop-ups, slow performance and security threats caused by spyware and other potentially unwanted software. The worldwide SpyNet community plays a key role in determining which suspicious programs are classified as spyware. Microsoft researchers quickly develop methods to counteract these threats, which are automatically downloaded to your PC, so you stay up-to-date. This product is free of charge for licensed Windows customers.

Editors' Review

Download.com Staff Feb 27, 2009

With Windows Defender, Microsoft's antispyware tool, the company slips a little open-source camaraderie through the door. Windows Defender's interface is clean and informative. Icons are logically placed in tabs, and the software is easily set to run unattended daily. Be sure to check the requirements, as many older systems cannot run this software.

Defender installs easily and updates quickly. The program's home page changes to display needed commands, such as download updates. The Full Scan is fast, but total scan time depends on your system and hard-drive size. The Quick Scan scans the most vulnerable areas and lives up to its name. Power users will want to configure Custom Scan; it's easy and scans only your selected areas. Vista users will notice that Defender includes extra options not found in versions for other Windows operating systems.

The power in antispyware is detecting and defeating new problems. Defender's SpyNet component lets users easily upload information about new problems. From those uploads, Windows quickly updates its spyware file, and users can simply check at SpyNet for solutions to spyware found on their PCs. Available only for validated Windows OS users, this powerful software operates quickly and easily. Novice users can practically set it and forget it; power users will find it easy to personalize to their systems.

Full Specifications

What's new in version 1.1.1

General

Release December 5, 2008
Date Added October 25, 2006
Version 1.1.1

Operating Systems

Operating Systems Windows, Windows 2000, Windows XP
Additional Requirements Windows 2000/XP/2003 Server

Popularity

Total Downloads 170,254
Downloads Last Week 52
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User Reviews

3.6/5
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Developer's Description

Windows Defender helps protect your computer against pop-ups, slow performance, and security threats caused by spyware and other unwanted software. Windows Defender features Real-Time Protection, a monitoring system that recommends actions against spyware when it's detected, minimizes interruptions, and helps you stay productive.