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Forefront Client Security anti-malware client update: March 2011Article ID: 2508823 On This PageIntroductionThis article describes the Microsoft Forefront Client Security (FCS) anti-malware client issues that are resolved in the March 2011 update package. Issues that this hotfix package resolvesIssue 1Computers that are running Forefront Client Security (FCS) and that frequently operate on battery power do not update definitions at the scheduled time.ResolutionThis update contains changes for Forefront Client Security (FCS) to let a computer that operates on battery power update definitions at the scheduled time.Issue 2You cannot open a file that is encrypted by Prim'X ZoneCentral and that is located in a network shared folder on a computer that is running Forefront Client Security (FCS).ResolutionThe installer for this update package sets the AttachWhenLoaded registry value for the Windows Filter Manager to 1 on certain operating systems. For more information about the AttachWhenLoaded registry value and the applicable operating systems, visit the following MSDN website:General information about the AttachWhenLoaded registry value and the applicable operating systems
(http://msdn.microsoft.com/en-us/library/ff539312(VS.85).aspx)
Issue 3Some real-time protection errors occur on computers that are running Windows 2000 Server and that use Forefront Client Security (FCS).ResolutionThis update changes MpFilter.sys to resolve this issue and to replace the update that is described in the following article:2459065
(http://support.microsoft.com/kb/2459065/
)
Real-time protection fails on Windows 2000 after you apply the Forefront Client Security October 2010 update MORE INFORMATIONHotfix informationA supported hotfix is available from Microsoft.Note This hotfix is available from Microsoft Update and from Windows Server Update Services (WSUS). If you want to obtain the hotfix for deployment by using a different method, follow these steps:
PrerequisitesThere are no prerequisites for installing this hotfix.Restart requirementYou must restart the computer after you apply this hotfix.Hotfix replacement informationThis hotfix replaces the anti-malware client that is deployed by using the Forefront Client Security deployment package (1.0.1725.0).2394439
This hotfix replaces the following hotfixes:
(http://support.microsoft.com/kb/2394439/
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Forefront Client Security deployment package (1.0.1728.0): October 20102394433
(http://support.microsoft.com/kb/2394433/
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Forefront Client Security antimalware client update: October 2010
2459065
(http://support.microsoft.com/kb/2459065/
)
Real-time protection fails on Windows 2000 after you apply the Forefront Client Security October 2010 update 979536
(http://support.microsoft.com/kb/979536/
)
Forefront Client Security anti-malware client update: April 2010
976668
(http://support.microsoft.com/kb/976668/
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Forefront Client Security anti-malware client update: December 2009
971026
(http://support.microsoft.com/kb/971026/
)
A hotfix is available to resolve some problems with the Forefront Client Security anti-malware client
952265
(http://support.microsoft.com/kb/952265/
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Data corruption may occur on a computer that has Forefront Client Security installed
938054
(http://support.microsoft.com/kb/938054/
)
A hotfix is available to resolve some problems with the Forefront Client Security client
956280
(http://support.microsoft.com/kb/956280/
)
The Forefront Client Security kernel-mode mini-filter unloads when you browse a network file share that contains many malicious files
File informationThe English version of this update has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.Forefront Client Security, x86-based versions Collapse this table
Forefront Client Security, x64-based versions Collapse this table
STATUSMicrosoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section. MORE INFORMATIONThis update is included in a new slipstream installation package of the Forefront Client Security client software. For more information about the slipstream installation package, click the following article number to view the article in the Microsoft Knowledge Base: 2508824
(http://support.microsoft.com/kb/2508824/
)
Forefront Client Security deployment package (1.0.1736.0): March 2011
Microsoft has identified an issue when this update is installed on Windows Vista, Windows Server 2008, Windows 7, or Windows Server 2008 R2, that may cause the antimalware agent to be removed when using the Windows install updates and shut down feature to apply this update. For more information on this issue see the following article:2524280
(http://support.microsoft.com/kb/2524280 /
)
Antimalware agent is removed after you apply Forefront Client Security March 2011 update when using install updates and shut down PropertiesArticle ID: 2508823 - Last Review: March 22, 2011 - Revision: 2.0
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