Windows Defender

Windows Defender
A component of Microsoft Windows
Details
Type Antivirus software on Windows 8+; formerly spyware removal software
Included with Windows Vista
Windows 7
Windows 8
Windows 8.1
Windows 10
Windows Server 2016
Also available for Windows XP
Windows Server 2003
Support status
Mainstream support
Related components
Microsoft Security Essentials

Windows Defender is an anti-malware component of Microsoft Windows. It was first released as a free antispyware program download for Windows XP, shipped with Windows Vista and Windows 7 and made into a full antivirus program replacing Microsoft Security Essentials as part of Windows 8 and later versions.

Basic features

Before Windows 8, Windows Defender protected against spyware. It included a number of real-time security agents that monitored several common areas of Windows for changes which might have been caused by spyware. It also included the ability to easily remove installed ActiveX software. Windows Defender featured integrated support for Microsoft SpyNet that allows users to report to Microsoft what they consider to be spyware, and what applications and device drivers they allow to be installed on their system. Protection against viruses was added in Windows 8; Windows Defender in Windows 8 resembles Microsoft Security Essentials (MSE) and uses the same virus definitions.

History

Beta

Microsoft AntiSpyware Beta 1 (Version 1.0.701)

Windows Defender is based on GIANT AntiSpyware, which was originally developed by GIANT Company Software, Inc. The company's acquisition was announced by Microsoft on December 16, 2004.[1][2] While the original GIANT AntiSpyware supported older Windows versions, support for the Windows 9x line of operating systems was later dropped.

The first beta version of Microsoft AntiSpyware was released on January 6, 2005 and was basically a repackaged GIANT AntiSpyware.[1] More builds were released in 2005, with the last Beta 1 refresh released on November 21, 2005.

At the 2005 RSA Security conference, Chief Software Architect and co-founder of Microsoft, Bill Gates, announced that Windows Defender (which was known as Microsoft AntiSpyware prior to November 4, 2005) would be made available free of charge to all validly licensed Windows 2000, Windows XP, and Windows Server 2003 users to help secure their systems against the increasing malware threat.[3]

Windows Defender (Beta 2) was released on February 13, 2006. It featured the program's new name and a significant user interface redesign. The core engine was rewritten in C++, unlike the original GIANT-developed one, which was written in Visual Basic.[4] This improved the application's performance. Also, since beta 2, the program works as a Windows service, unlike earlier releases, which enables the application to protect the computer even when a user is not logged on. Beta 2 also requires Windows Genuine Advantage validation. However, Windows Defender (Beta 2) did not contain some of the tools found in Microsoft AntiSpyware (Beta 1); Microsoft removed the System Inoculation, Secure Shredder and System Explorer tools found in MSAS (Beta 1) as well as the Tracks Eraser tool, which allowed users to easily delete many different types of temporary files related to Internet Explorer 6, including HTTP cookies, web cache, and Windows Media Player playback history.[1] Microsoft later released German and Japanese versions of Windows Defender (Beta 2).[5][6]

General availability

On October 24, 2006, Microsoft released Windows Defender. It supports Windows XP and Windows Server 2003; however, unlike the betas, it does not run on Windows 2000.[7]

In Windows 10, Windows Defender is on by default. It switches itself off on installation of a third party anti-virus package.[8]

Conversion to antivirus

Windows Defender was released with Windows Vista and Windows 7, serving as their built-in antispyware component. In Windows Vista and Windows 7, Windows Defender was superseded by Microsoft Security Essentials, an antimalware product from Microsoft which provided protection against a wider range of malware. Upon installation, Microsoft Security Essentials disabled and replaced Windows Defender.[9][10][11] In Windows 8, Microsoft upgraded Windows Defender into an antivirus program very similar to Microsoft Security Essentials for Windows 7[12] and using the same virus definition updates. MSE itself does not run on Windows versions beyond 7.

Advanced features

Windows Defender successfully blocks the EICAR test file
Real-time protection
In the Windows Defender options, the user can configure real-time protection options.
Browser integration
Integration with Internet Explorer and Microsoft Edge enables files to be scanned as they are downloaded to detect malicious software inadvertently downloaded. Although it does not integrate with non-Microsoft web browsers, Windows Defender scans for malicious downloaded files as part of its real-time protection.

Windows 10's Anniversary Update introduced Limited Periodic Scanning, which optionally allows Windows Defender to scan a system periodically if another antivirus app is installed.[13] It also introduced Block at First Sight, which uses machine learning to predict whether a file is malicious.[14]

Windows Vista-specific functionality

Windows Defender had additional functionality in Windows Vista which was removed in subsequent versions of Windows.

Security agents
Security agents monitor the computer for malicious activities.
Software Explorer
The Advanced Tools section allows users to discover potential vulnerabilities with a series of Software Explorers. They provide views of startup programs, currently running software, network connected applications, and Winsock providers (Winsock LSPs). In each Explorer, every element is rated as either "Known", "Unknown" or "Potentially Unwanted". The first and last categories carry a link to learn more about the particular item, and the second category invites users to submit the program to Microsoft SpyNet for analysis by community members.[15][16] The Software Explorer feature has been removed from Windows Defender in Windows 7,[17] for which Microsoft recommends using Windows Sysinternals' AutoRuns program for controlling which programs run when the computer starts.
Notification of startup programs that run as an administrator
Windows Defender in Windows Vista automatically blocks all startup items that require administrator privileges to run (this is considered suspicious behavior for a startup item). This automatic blocking is related to the User Account Control functionality in Windows Vista, and requires users to manually run each of these startup items each time they log in if they desire the item to run at startup.[18]
User interface
In Windows Vista, it is possible to close the window and have the program run in the system tray while a scan is running. However, in Windows 7, this functionality was removed and the window must remain open while a scan is running.

In Windows 10, Windows Defender settings are controlled by the Settings app, and the Settings button opens the Settings app.

In the Windows 10 Anniversary Update, toast notifications appear to announce the results of a scan, even if no viruses is found. The same update introduced a new flat logo.[19]

Windows Defender Offline

Windows Defender Offline (formerly known as Standalone System Sweeper Beta[20]) is a bootable standalone antimalware program that runs from a bootable disk and is designed to scan infected systems while their operating systems are offline.[21] Since Windows 10 Anniversary Update, offline functionality is integrated into the regular Windows Defender program.[22]

See also

References

  1. 1 2 3 Thurrot, Paul (6 October 2010). "Microsoft Windows Anti-Spyware Preview: Paul Thurott's SuperSite for Windows". SuperSite for Windows. Retrieved 26 November 2013.
  2. ↑ "Microsoft Acquires Anti-Spyware Leader GIANT Company". PressPass. Microsoft. December 16, 2004. Retrieved 11 November 2009.
  3. ↑ "Gates Highlights Progress on Security, Outlines Next Steps for Continued Innovation". PressPass. Microsoft Corporation. February 15, 2005. Retrieved 11 November 2009.
  4. ↑ Thurrott, Paul (14 February 2006). "Windows Defender Beta 2 Review: Paul Thurrott's SuperSite for Windows". SuperSite for Windows. Retrieved 26 November 2013.
  5. ↑ "Windows Defender: Startseite" (in German). Microsoft Corporation. Archived from the original on 30 January 2009. Retrieved 8 May 2011.
  6. ↑ "マイクロソフト セキュリティ At Home" (in Japanese). Microsoft Corporation. Archived from the original on 18 January 2010. Retrieved 8 May 2011.
  7. ↑ Thurrott, Paul (24 October 2006). "Finally, Microsoft Ships Windows Defender". Windows IT Pro. Retrieved 8 May 2011.
  8. ↑ http://windows.microsoft.com/en-gb/windows-10/getstarted-protect-your-pc
  9. ↑ Thurrott, Paul (18 June 2009). "Microsoft Security Essentials Public Beta". Paul Thurrott's SuperSite for Windows. Retrieved 8 May 2011.
  10. ↑ Hau, Kevin (23 June 2009). "Windows Defender and Microsoft Security Essentials". Microsoft Answers. Microsoft Corporation. Retrieved 8 May 2011.
  11. ↑ Marius, Marius Oiaga (30 August 2010). "Microsoft Security Essentials 1.0 and 2.0 Disable Windows Defender". Softpedia. SoftNews NET SRL. Retrieved 8 May 2011.
  12. ↑ Windows 8 Consumer Preview: Set Up Windows 8 with the Web Installer
  13. ↑ http://www.windowscentral.com/whats-new-windows-defender-windows-10-anniversary-update
  14. ↑ http://betanews.com/2016/11/18/windows-10-block-at-first-sight-protection-in-windows-defender/
  15. ↑ "Using Software Explorer in Windows Defender". How-to. Microsoft. Retrieved May 9, 2015.
  16. ↑ O'Reilly, Dennis (April 22, 2008). "Software Explorer keeps unneeded apps from auto-starting". CNET. CBS Interactive. Retrieved May 9, 2015.
  17. ↑ Thurrott, Paul (October 6, 2010). "Windows 7 Annoyances". Supersite for Windows. Penton. Retrieved May 9, 2015.
  18. ↑ "Error message when you start a Windows Vista-based computer: 'Windows has blocked some startup programs'". Support. Microsoft. September 23, 2011. Retrieved May 9, 2015.
  19. ↑ http://www.windowscentral.com/whats-new-windows-defender-windows-10-anniversary-update
  20. ↑ Microsoft Standalone System Sweeper
  21. ↑ "Windows Defender Offline". Microsoft.com. Microsoft. Retrieved 1 January 2012.
  22. ↑ "Help protect my PC with Windows Defender Offline" Microsoft. Accessed 4 October 2016

External links

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