Windows Defender

Updated: October 23, 2007

Applies To: Windows Server 2008

Windows Defender is a security technology used for the detection and mitigation of spyware and other potentially unwanted software. Windows Defender provides advanced system scanning and spyware removal technologies that simplify the removal of spyware and other potentially unwanted software from a computer.

Hierarchy of Managed Entities

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Managed Entities

Name Description

Microsoft Antimalware Engine

The Microsoft Antimalware Engine identifies and removes spyware and other potentially unwanted software. It uses a definition database that lists the characteristics of known spyware and other potentially unwanted software.

Windows Defender Real-Time Protection

Real-Time Protection (RTP) is a feature of Windows Defender, running in the context of the logged-on user, that monitors the registry and file system on the computer by using agents that monitor auto-start extensibility points (ASEP). By default, Windows Defender monitors the following ASEPs: applications that are configured to automatically start when the computer boots up, system configuration settings, Internet Explorer Add-ons, Internet Explorer configuration settings, installed services, installed drivers, application registration, and Windows Add-ons.

Windows Defender Definitions

Windows Defender uses definitions, also known as signatures, that contain information about spyware and other potentially unwanted software. All definitions are stored in a definition database and include the changes that are made by spyware and other potentially unwanted software to the operating system. This information is used to detect and remove spyware and other potentially unwanted software.
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Community Content

Stanley Roark
Windows Defender problems
Every time that the system starts, windows defender fails to start and gives an error message 0x800106ba. When I go to Windows Defender and try to open it, I get the same error message<br /><br /><b>[tfl - 25 08 09] Hi - and thanks for your post.You should post questions like this to the Technet Forums at http://forums.microsoft.com/technet or the MS Newsgroups at <br /><br /> http://www.microsoft.com/communities/newsgroups/en-us/. You are much more likely get a quick response using the forums than through the Community Content. For specific help about:<br /> Exchange : http://groups.google.com/groups/dir?sel=usenet%3Dmicrosoft.public.exchange%2C&amp;amp;amp;amp;amp;<br /> SQL Server : http://groups.google.com/groups/dir?sel=usenet%3Dmicrosoft.public.sqlserver%2C&amp;amp;amp;amp;amp;<br /> Windows : http://groups.google.com/groups/dir?sel=usenet%3Dmicrosoft.public.windows%2C&amp;amp;amp;amp;amp;<br /> Windows Server : http://groups.google.com/groups/dir?sel=usenet%3Dmicrosoft.public.windows.server%2C&amp;amp;amp;amp;amp;<br /> Virtual Server : http://groups.google.com/group/microsoft.public.virtualserver/topics?lnk<br /> Full Public : http://groups.google.com/groups/dir?sel=usenet%3Dmicrosoft.public%2C&amp;amp;amp;amp;amp;<br /></b><br />
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Thomas Lee
Windows Defender
I have an error every time I open Windows Defender. It tells me that windows defender is out of date,and when I update it answer comes no definition files are available. How do I go about doing this? I also now have Trojans and worms. I need to remove these as well without paying any monies.<br /><br /><b>[tfl - 25 08 09] Hi - and thanks for your post.You should post questions like this to the Technet Forums at http://forums.microsoft.com/technet or the MS Newsgroups at <br /><br /> http://www.microsoft.com/communities/newsgroups/en-us/. You are much more likely get a quick response using the forums than through the Community Content. For specific help about:<br /> Exchange : http://groups.google.com/groups/dir?sel=usenet%3Dmicrosoft.public.exchange%2C&amp;amp;<br /> SQL Server : http://groups.google.com/groups/dir?sel=usenet%3Dmicrosoft.public.sqlserver%2C&amp;amp;<br /> Windows : http://groups.google.com/groups/dir?sel=usenet%3Dmicrosoft.public.windows%2C&amp;amp;<br /> Windows Server : http://groups.google.com/groups/dir?sel=usenet%3Dmicrosoft.public.windows.server%2C&amp;amp;<br /> Virtual Server : http://groups.google.com/group/microsoft.public.virtualserver/topics?lnk<br /> Full Public : http://groups.google.com/groups/dir?sel=usenet%3Dmicrosoft.public%2C&amp;amp;<br /></b><br />

splat1
boovy2804
Islamar, have you resolved the windows defender problem, as I have the same message?<br /><br /><b>[tfl - 25 08 09] Hi - and thanks for your post.You should post questions like this to the Technet Forums at http://forums.microsoft.com/technet or the MS Newsgroups at <br /><br />http://www.microsoft.com/communities/newsgroups/en-us/. You are much more likely get a quick response using the forums than through the Community Content. For specific help about:<br />Exchange : http://groups.google.com/groups/dir?sel=usenet%3Dmicrosoft.public.exchange%2C&amp;<br />SQL Server : http://groups.google.com/groups/dir?sel=usenet%3Dmicrosoft.public.sqlserver%2C&amp;<br />Windows : http://groups.google.com/groups/dir?sel=usenet%3Dmicrosoft.public.windows%2C&amp;<br />Windows Server : http://groups.google.com/groups/dir?sel=usenet%3Dmicrosoft.public.windows.server%2C&amp;<br />Virtual Server : http://groups.google.com/group/microsoft.public.virtualserver/topics?lnk<br />Full Public : http://groups.google.com/groups/dir?sel=usenet%3Dmicrosoft.public%2C&amp;<br /></b><br />

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