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Windows Defender

A security solution which will protect your computer against a wide variety of threats

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Windows Defender screenshotWindows Defender is a free and powerful security software which will help you protect your computer against a wide range of security threats, pop-ups and slow performance caused by potentially unwanted programs (PUPs), spyware or other types of malware.

Windows Defender will always download the latest definitions of the security threats. The global SpyNet community plays an important role in determining which suspicious software is classified as malware or spyware.

Windows Defender comes with an overhauled user interface which offers simplicity and increased functionality. The protection, detection and removal functions were significantly improved as well. The application also provides support for 64-bit system architectures, localization and accessibility.


  • Offers increased functionality and accessibility.
  • Allow you to protect your PC against various threats.
Name Windows Defender
Developer | see all products from this developer
Product Homepage Windows Defender
License Free (Freeware)
Last Week Downloads 0
All Time Downloads 10,526
Filename mssstool32.exe
Filesize 0.9MB
MD5 Checksum FDFE83474ABC553847A007A620CF7C9A
OS Support Windows All
Category Utilities

100% CLEAN Certification

BadgeWindows Defender has been tested by team against viruses, spyware, adware, trojan, backdoors and was found to be 100% clean. Our editors will recheck this software periodically to assure that it remains clean.


Old Versions

Software Date Added
Windows Defender July 22, 2016 - Latest Version
Windows Defender 1.75.1117.0 November 29, 2012
Windows Defender 1.1 December 03, 2007
Windows Defender beta 2 February 18, 2006

Download the free Windows Defender