Anti-malware platform update for Windows Defender in Windows 8 and Windows RT

View products that this article applies to.

Summary

This anti-malware platform update for Windows Defender updates Windows Defender services, drivers, and UIs.

Microsoft regularly releases anti-malware platform updates to guarantee consistency in protection, performance, robustness, and usability in a malware landscape that is constantly changing.

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More Information

This anti-malware platform update contains the following improvements:

Hardening improvements to the anti-malware platform
Performance improvements to the anti-malware platform
UI improvements to the anti-malware platform

This update also fixes a Windows Defender deadlock issue that is fixed in hotfix 2950183.

Update information

How to obtain this update

Windows Update

This update is available from Windows Update.

Microsoft Download Center

The following files are available for download from the Microsoft Download Center:

Operating system	Update
All supported x86-based versions of Windows 8.1	Download the package now.
All supported x64-based versions of Windows 8.1	Download the package now.
All supported x86-based versions of Windows 8	Download the package now.
All supported x64-based versions of Windows 8	Download the package now.

For more information about how to download Microsoft support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 How to obtain Microsoft support files from online services

Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help prevent any unauthorized changes to the file.

Prerequisites

To apply this update, you must be running one of the following operating systems:

Windows RT 8.1
Windows 8.1
Windows RT
Windows 8

Registry information

To apply this update, you do not have to make any changes to the registry.

Restart requirement

You may have to restart the computer after you apply this update.

Update replacement information

This update replaces the update that is described in Microsoft Knowledge Base (KB) article 2894853. For more information about KB article 2894853, click the following article number to view the article in the Microsoft Knowledge Base:

2894853 Anti-malware platform update for Windows Defender is available in Windows 8, Windows RT, Windows 8.1, and Windows RT 8.1

File information

The global version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.

Windows RT and Windows 8 file information notes

Important Windows 8 hotfixes and Windows Server 2012 hotfixes are included in the same packages. However, only "Windows 8" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 8" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.

For Windows RT

File name	File version	File size	Date	Time	Platform
Wdboot.sys	4.5.213.0	29,712	07-Mar-2014	00:11	Not applicable
Wdfilter.sys	4.5.213.0	214,432	06-Mar-2014	23:13	Not applicable
Mpevmsg.dll	4.5.213.0	113,136	06-Mar-2014	23:13	Not applicable
Mpuxhostproxy.dll	4.5.213.0	28,920	06-Mar-2014	23:13	Not applicable
Mpuxsrv.exe	4.5.213.0	52,832	06-Mar-2014	23:13	Not applicable
Windows.defender.lnk	Not applicable	1,139	25-Jul-2012	20:18	Not applicable
Mpasdesc.dll	4.5.213.0	152,560	06-Mar-2014	23:13	Not applicable
Mpclient.dll	4.5.213.0	689,368	06-Mar-2014	23:13	Not applicable
Mpcmdrun.exe	4.5.213.0	272,168	07-Mar-2014	00:11	Not applicable
Mpcommu.dll	4.5.213.0	266,424	06-Mar-2014	23:13	Not applicable
Mpoav.dll	4.5.213.0	91,296	06-Mar-2014	23:13	Not applicable
Mprtp.dll	4.5.213.0	389,272	06-Mar-2014	23:13	Not applicable
Mpsvc.dll	4.5.213.0	1,239,616	06-Mar-2014	23:13	Not applicable
Mptpmatt.dll	4.5.213.0	50,200	06-Mar-2014	23:13	Not applicable
Msmpcom.dll	4.5.213.0	56,320	06-Mar-2014	23:44	Not applicable
Msmpeng.exe	4.5.213.0	15,544	07-Mar-2014	00:11	Not applicable
Msmplics.dll	4.5.213.0	22,312	06-Mar-2014	23:13	Not applicable
Eppmanifest.dll	4.5.213.0	155,120	06-Mar-2014	23:13	Not applicable
Msascui.exe	4.5.213.0	1,050,008	06-Mar-2014	23:13	Not applicable
Msmpres.dll	4.5.213.0	440,816	06-Mar-2014	23:13	Not applicable

For all supported x86-based versions of Windows 8

File name	File version	File size	Date	Time	Platform
Wdboot.sys	4.5.213.0	30,224	07-Mar-2014	01:51	x86
Wdfilter.sys	4.5.213.0	231,168	06-Mar-2014	23:13	x86
Wdboot.sys	4.5.213.0	30,224	07-Mar-2014	01:53	x86
Wdfilter.sys	4.5.213.0	231,168	06-Mar-2014	23:12	x86
Mpevmsg.dll	4.5.213.0	111,264	06-Mar-2014	23:13	x86
Mpevmsg.dll	4.5.213.0	111,264	06-Mar-2014	23:12	x86
Mpuxhostproxy.dll	4.5.213.0	29,000	06-Mar-2014	23:13	x86
Mpuxsrv.exe	4.5.213.0	51,256	06-Mar-2014	23:13	x86
Windows.defender.lnk	Not applicable	1,139	25-Jul-2012	20:24	Not applicable
Mpuxhostproxy.dll	4.5.213.0	29,000	06-Mar-2014	23:12	x86
Mpuxsrv.exe	4.5.213.0	51,256	06-Mar-2014	23:12	x86
Windows.defender.lnk	Not applicable	1,139	25-Jul-2012	20:24	Not applicable
Dbghelp.dll	6.12.2.633	1,213,200	07-Nov-2012	18:36	x86
Mpasdesc.dll	4.5.213.0	150,688	06-Mar-2014	23:13	x86
Mpclient.dll	4.5.213.0	693,328	06-Mar-2014	23:13	x86
Mpcmdrun.exe	4.5.213.0	294,360	07-Mar-2014	06:06	x86
Mpcommu.dll	4.5.213.0	275,680	06-Mar-2014	23:13	x86
Mpoav.dll	4.5.213.0	115,648	06-Mar-2014	23:13	Not applicable
Mprtp.dll	4.5.213.0	426,776	06-Mar-2014	23:13	x86
Mpsvc.dll	4.5.213.0	1,298,000	06-Mar-2014	23:13	x86
Mptpmatt.dll	4.5.213.0	49,720	06-Mar-2014	23:13	x86
Msmpcom.dll	4.5.213.0	57,856	07-Mar-2014	00:47	x86
Msmpeng.exe	4.5.213.0	14,480	07-Mar-2014	06:06	x86
Msmplics.dll	4.5.213.0	20,416	06-Mar-2014	23:13	x86
Symsrv.dll	6.12.2.633	131,856	07-Nov-2012	18:36	x86
Symsrv.yes	Not applicable	1	07-Nov-2012	18:36	Not applicable
Dbghelp.dll	6.12.2.633	1,213,200	06-Nov-2012	23:04	x86
Mpasdesc.dll	4.5.213.0	150,688	06-Mar-2014	23:12	x86
Mpclient.dll	4.5.213.0	693,328	06-Mar-2014	23:12	x86
Mpcmdrun.exe	4.5.213.0	294,360	07-Mar-2014	02:25	x86
Mpcommu.dll	4.5.213.0	275,680	06-Mar-2014	23:12	x86
Mpoav.dll	4.5.213.0	115,648	06-Mar-2014	23:12	Not applicable
Mprtp.dll	4.5.213.0	426,776	06-Mar-2014	23:12	x86
Mpsvc.dll	4.5.213.0	1,298,000	06-Mar-2014	23:12	x86
Mptpmatt.dll	4.5.213.0	49,720	06-Mar-2014	23:12	x86
Msmpcom.dll	4.5.213.0	57,856	07-Mar-2014	00:57	x86
Msmpeng.exe	4.5.213.0	14,480	07-Mar-2014	02:25	x86
Msmplics.dll	4.5.213.0	20,416	06-Mar-2014	23:12	x86
Symsrv.dll	6.12.2.633	131,856	06-Nov-2012	23:04	x86
Symsrv.yes	Not applicable	1	06-Nov-2012	23:04	Not applicable
Eppmanifest.dll	4.5.213.0	153,248	06-Mar-2014	23:13	x86
Msascui.exe	4.5.213.0	1,015,448	06-Mar-2014	23:13	x86
Msmpres.dll	4.5.213.0	438,944	06-Mar-2014	23:13	x86
Eppmanifest.dll	4.5.213.0	153,248	06-Mar-2014	23:12	x86
Msascui.exe	4.5.213.0	1,015,448	06-Mar-2014	23:12	x86
Msmpres.dll	4.5.213.0	438,944	06-Mar-2014	23:12	x86

For all supported x64-based versions of Windows 8

File name	File version	File size	Date	Time	Platform
Wdboot.sys	4.5.213.0	35,856	07-Mar-2014	07:52	x64
Wdfilter.sys	4.5.213.0	270,112	06-Mar-2014	23:13	x64
Wdboot.sys	4.5.213.0	35,856	07-Mar-2014	03:08	x64
Wdfilter.sys	4.5.213.0	270,112	06-Mar-2014	23:12	x64
Mpevmsg.dll	4.5.213.0	111,264	06-Mar-2014	23:13	x64
Mpevmsg.dll	4.5.213.0	111,264	06-Mar-2014	23:12	x64
Mpuxhostproxy.dll	4.5.213.0	28,032	06-Mar-2014	23:13	x64
Mpuxsrv.exe	4.5.213.0	55,984	06-Mar-2014	23:13	x64
Windows.defender.lnk	Not applicable	1,139	25-Jul-2012	20:21	Not applicable
Mpuxhostproxy.dll	4.5.213.0	28,032	06-Mar-2014	23:12	x64
Mpuxsrv.exe	4.5.213.0	55,984	06-Mar-2014	23:12	x64
Windows.defender.lnk	Not applicable	1,139	25-Jul-2012	20:21	Not applicable
Dbghelp.dll	6.12.2.633	1,558,912	07-Nov-2012	23:04	x64
Mpasdesc.dll	4.5.213.0	150,688	06-Mar-2014	23:13	x64
Mpclient.dll	4.5.213.0	918,328	06-Mar-2014	23:13	x64
Mpcmdrun.exe	4.5.213.0	342,408	07-Mar-2014	07:52	x64
Mpcommu.dll	4.5.213.0	350,488	06-Mar-2014	23:13	x64
Mpoav.dll	4.5.213.0	118,776	06-Mar-2014	23:13	x64
Mprtp.dll	4.5.213.0	549,464	06-Mar-2014	23:13	x64
Mpsvc.dll	4.5.213.0	1,639,304	06-Mar-2014	23:13	x64
Mptpmatt.dll	4.5.213.0	51,832	06-Mar-2014	23:13	x64
Msmpcom.dll	4.5.213.0	66,048	07-Mar-2014	00:08	x64
Msmpeng.exe	4.5.213.0	16,048	07-Mar-2014	07:52	x64
Msmplics.dll	4.5.213.0	20,416	06-Mar-2014	23:13	x64
Symsrv.dll	6.12.2.633	149,264	07-Nov-2012	23:04	x64
Symsrv.yes	Not applicable	1	07-Nov-2012	23:04	Not applicable
Dbghelp.dll	6.12.2.633	1,558,912	06-Nov-2012	23:04	x64
Mpasdesc.dll	4.5.213.0	150,688	06-Mar-2014	23:12	x64
Mpclient.dll	4.5.213.0	918,328	06-Mar-2014	23:12	x64
Mpcmdrun.exe	4.5.213.0	342,408	07-Mar-2014	02:41	x64
Mpcommu.dll	4.5.213.0	350,488	06-Mar-2014	23:12	x64
Mpoav.dll	4.5.213.0	118,776	06-Mar-2014	23:12	x64
Mprtp.dll	4.5.213.0	549,464	06-Mar-2014	23:12	x64
Mpsvc.dll	4.5.213.0	1,639,304	06-Mar-2014	23:12	x64
Mptpmatt.dll	4.5.213.0	51,832	06-Mar-2014	23:12	x64
Msmpcom.dll	4.5.213.0	66,048	07-Mar-2014	00:34	x64
Msmpeng.exe	4.5.213.0	16,048	07-Mar-2014	02:41	x64
Msmplics.dll	4.5.213.0	20,416	06-Mar-2014	23:12	x64
Symsrv.dll	6.12.2.633	149,264	06-Nov-2012	23:04	x64
Symsrv.yes	Not applicable	1	06-Nov-2012	23:04	Not applicable
Eppmanifest.dll	4.5.213.0	153,248	06-Mar-2014	23:13	x64
Msascui.exe	4.5.213.0	1,334,952	06-Mar-2014	23:13	Not applicable
Msmpres.dll	4.5.213.0	438,944	06-Mar-2014	23:13	x64
Eppmanifest.dll	4.5.213.0	153,248	06-Mar-2014	23:12	x64
Msascui.exe	4.5.213.0	1,334,952	06-Mar-2014	23:12	Not applicable
Msmpres.dll	4.5.213.0	438,944	06-Mar-2014	23:12	x64
Mpasdesc.dll	4.5.213.0	150,688	06-Mar-2014	23:13	x86
Mpclient.dll	4.5.213.0	693,328	06-Mar-2014	23:13	x86
Mpoav.dll	4.5.213.0	115,648	06-Mar-2014	23:13	Not applicable
Msmplics.dll	4.5.213.0	20,416	06-Mar-2014	23:13	x86
Mpasdesc.dll	4.5.213.0	150,688	06-Mar-2014	23:12	x86
Mpclient.dll	4.5.213.0	693,328	06-Mar-2014	23:12	x86
Mpoav.dll	4.5.213.0	115,648	06-Mar-2014	23:12	Not applicable
Msmplics.dll	4.5.213.0	20,416	06-Mar-2014	23:12	x86

Windows RT 8.1 and Windows 8.1 file information notes

Important Windows 8.1 hotfixes and Windows Server 2012 R2 hotfixes are included in the same packages. However, only "Windows 8.1" is listed on the Hotfix Request page. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 8.1" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.

For Windows RT 8.1

File name	File version	File size	Date	Time	Platform
Defender.psd1	Not applicable	1,252	21-Oct-2013	22:11	Not applicable
Msft_mpcomputerstatus.cdxml	Not applicable	493	21-Oct-2013	22:11	Not applicable
Msft_mppreference.cdxml	Not applicable	35,341	21-Oct-2013	22:11	Not applicable
Msft_mpscan.cdxml	Not applicable	1,821	21-Oct-2013	22:11	Not applicable
Msft_mpsignature.cdxml	Not applicable	1,805	21-Oct-2013	22:11	Not applicable
Msft_mpthreat.cdxml	Not applicable	1,431	21-Oct-2013	22:11	Not applicable
Msft_mpthreatcatalog.cdxml	Not applicable	933	21-Oct-2013	22:11	Not applicable
Msft_mpthreatdetection.cdxml	Not applicable	925	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	85,236	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	85,128	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	87,036	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	86,028	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	59,730	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	60,674	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	84,280	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	82,188	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,674	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	932	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	53,748	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	53,938	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	53,938	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mof	Not applicable	27,050	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mof	Not applicable	2,382	21-Oct-2013	22:11	Not applicable

For all supported x86-based versions of Windows 8.1

File name	File version	File size	Date	Time	Platform
Defender.psd1	Not applicable	1,252	21-Oct-2013	22:11	Not applicable
Msft_mpcomputerstatus.cdxml	Not applicable	493	21-Oct-2013	22:11	Not applicable
Msft_mppreference.cdxml	Not applicable	35,341	21-Oct-2013	22:11	Not applicable
Msft_mpscan.cdxml	Not applicable	1,821	21-Oct-2013	22:11	Not applicable
Msft_mpsignature.cdxml	Not applicable	1,805	21-Oct-2013	22:11	Not applicable
Msft_mpthreat.cdxml	Not applicable	1,431	21-Oct-2013	22:11	Not applicable
Msft_mpthreatcatalog.cdxml	Not applicable	933	21-Oct-2013	22:11	Not applicable
Msft_mpthreatdetection.cdxml	Not applicable	925	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	85,236	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	85,128	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	87,036	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	86,028	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	59,730	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	60,674	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	84,280	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	82,188	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,674	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	932	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	53,748	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	53,938	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	53,938	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mof	Not applicable	27,050	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mof	Not applicable	2,382	21-Oct-2013	22:11	Not applicable
Symsrv.yes	Not applicable	1	18-Jun-2013	12:19	Not applicable

For all supported x64-based versions of Windows 8.1

File name	File version	File size	Date	Time	Platform
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	85,236	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	85,128	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	87,036	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	86,028	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	59,730	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	60,674	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	84,280	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	82,188	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,674	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	932	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	77,652	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	53,748	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	53,938	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mfl	Not applicable	53,938	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mfl	Not applicable	930	21-Oct-2013	22:11	Not applicable
Protectionmanagement.mof	Not applicable	27,050	21-Oct-2013	22:11	Not applicable
Protectionmanagement_uninstall.mof	Not applicable	2,382	21-Oct-2013	22:11	Not applicable
Symsrv.yes	Not applicable	1	18-Jun-2013	14:43	Not applicable
Mpclient.dll	4.5.218.0	693,328	24-Mar-2014	00:15	x86

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For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

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Applies to:

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Keywords: atdownload, kbsurveynew, kbfix, kbexpertiseadvanced, kb

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Article Info

Article ID	:	2939153
Revision	:	2
Created on	:	4/9/2020
Published on	:	4/9/2020
Exists online	:	False
Views	:	529

Microsoft KB Archive Search

Anti-malware platform update for Windows Defender in Windows 8 and Windows RT

Summary

More Information

Update information

How to obtain this update

Windows Update

Microsoft Download Center

Prerequisites

Registry information

Restart requirement

Update replacement information

Windows RT and Windows 8 file information notes

For Windows RT

For all supported x86-based versions of Windows 8

For all supported x64-based versions of Windows 8

Windows RT 8.1 and Windows 8.1 file information notes

For Windows RT 8.1

For all supported x86-based versions of Windows 8.1

For all supported x64-based versions of Windows 8.1

Applies to: