6.1.7600.16385 (win7_rtm.090713-1255) 21.91%
6.1.7600.16385 (win7_rtm.090713-1255) 32.71%
6.1.7600.16384 (win7_rtm.090710-1945) 0.06%
4.5.0218.0 2.13%
4.5.0216.0 1.63%
4.4.0304.0 1.13%
4.4.0207.0 0.06%
4.3.9600.16384 (winblue_rtm.130821-1623) 1.44%
4.3.9600.16384 (winblue_rtm.130821-1623) 0.06%
4.3.9431.0 (winmain_bluemp.130615-1214) 0.31%
4.3.9431.0 (winmain_bluemp.130615-1214) 0.06%
4.3.0219.0 2.45%
4.3.0216.0 0.94%
4.3.0215.0 1.13%
4.3.0215.0 0.38%
4.3.0215.0 0.82%
4.2.0223.0 4.77%
4.2.0223.0 4.77%
4.2.0223.0 0.38%
4.0.9200.16384 (win8_rtm.120725-1247) 1.13%
4.0.9200.16384 (win8_rtm.120725-1247) 3.14%
4.0.8400.0 (winmain_win8rc.120518-1423) 0.06%
1.1.1600.0 16.07%
1.1.1593.0 1.38%
1.1.1505.0 1.07%



IOfficeAntiVirus Module by Microsoft Corporation (Signed)

Remove MpOAV.dll
This is a Windows system installed file with Windows File Protection (WFP) enabled.


There are 25 versions of mpoav.dll in the wild, the latest version being 6.1.7600.16385 (win7_rtm.090713-1255). The average file size is about 84.75 KB. The file is a digitally signed and issued to Microsoft Corporation by Microsoft Corporation. The programs Microsoft Security Essentials, Microsoft Security Essentials Prerelease and Windows iLivid Toolbar have been observed as installing specific variations of mpoav.dll.

What is mpoav.dll?

Microsoft Malware Protection is part of Microsoft Security Essentials suite of anti-virus products including Windows Defender and Microsoft Malware Protection. It intagrates with Microsoft Office 2007/2010 as an anti-virus plugin which is designed to scan downloaded files and document attachments for malware and takes actions if a virus or trojan is discovered. WIth Windows Vista, Microsoft Malware Protection Anti-Virus plugin was automatically installed.

About mpoav.dll (from Microsoft Corporation)

Windows Defender is software that helps protect your computer against pop-ups, slow performance, and security threats caused by spyware and other unwanted software by detecting and removing known spyw


File name:mpoav.dll
Publisher:Microsoft Corporation
Product name:IOfficeAntiVirus Module
Description:Microsoft® Windows® Operating System
Typical file path:C:\Program Files\windows defender\mpoav.dll
Issued to:Microsoft Corporation
Authority (CA):Microsoft Corporation
Expiration date:Monday, March 4, 2013

ResourcesPrograms installed in

(Note, the programs listed below are for all versions of IOfficeAntiVirus Module.)
Bandoo Media Inc
  79% remove
This toolbar is typiclaly bundled with the installation of the free iLivid software. Windows iLivid Toolbar by Bandoo for Intenet Explorer collects and stores information about your web browsing habit...
Microsoft Corporation
8% remove
Microsoft Security Essentials is an antivirus software product that provides protection against different types of malware such as computer viruses, spyware, rootkits and Trojan horses. It runs on Win...
Microsoft Corporation
1% remove
The Microsoft Security Essentials Prerelease program allows users to run the latest & greatest versions of Security Essentials before they are publicy available.
Microsoft Corporation
1% remove
Manage PCs and multiple types of mobile devices in one unified solution, either through the cloud or by extending your existing on-premises infrastructure. Whether using corporate or employee-owned de...
Microsoft Corporation
4% remove
Endpoint Protection uses the monitoring and deployment capabilities of Configuration Manager to streamline the deployment of antimalware definitions and uses Configuration Manager to provide an in-con...
Microsoft Corporation
1% remove
Microsoft Forefront is a family of line-of-business security software that are designed to help protect computer networks, network servers (such as Microsoft Exchange Server and Microsoft SharePoint ...
Skype Technologies S.A.
7% remove
Skype is a proprietary Voice over IP service and software application. The service allows users to communicate with peers by voice using a microphone, video by using a webcam, and instant messaging ov...


(Note, the behaviors below are for all versions of mpoav.dll, select a unique version for details.)
IOffice antivirus plugins
  • {2781761E-28E0-4109-99FE-B9D127C57AFE}
Approved shell extensions
Located in the registry at 'SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions\Approved'
  • 'Windows Defender IOfficeAntiVirus implementation' with CLSID {2781761E-28E0-4109-99FE-B9D127C57AFE}

VersionsAll file variations of mpoav.dll

MD5SHA-1File size
79e485e1361da3cbe01ff760867f1d26 da2ff7ed8ec8a7f9411c098b1c2cdcfc1dc6fad5 53.5 KB
5a4a633b3a84086cab6ad61ba54c8d0c 03f5873612e915d39ad1a090808dc52a463af8ce 51 KB
71640bfe9b51d4c6c73dac52a3eb5d9c c7555456efb9f456d43a0ae6048f28ee7c85489b 53.5 KB
ee98428ae275eaab246fa547ca98768d c1616e6ef008af8d4abbf6343636a60548af9b5b 115.99 KB
9c479ca1c6aee5b11fa8f33623b27c3d 2b808efdcdf36123619e7c0c9db183845c92df98 112.94 KB
712d83788f21d229adfa9f1f58aa2386 220c0394fe050b7f468db9da527d409b3029c8a6 112.93 KB
4cf24f379544f66df763be4b7f543c6e f0d549d757851207f28f701a63ef4e30c9656589 112.93 KB
e96b353468877a37ddea6c5e13e5e36c 9e31019a4e727ecdbcfcceec9da8402714e64351 79.5 KB
664608622b2de9eb1d47d704f6005ff6 9ed7948c664ac400a96188035ba0366edb3a0392 78.5 KB
f25dff0d2bc203360a0e8ee39f7e663b c26da67cc27b4abe90bc8f58629e62b23f97a14a 79.5 KB
470a5a0aa4b15caa8ce244b3ed93f5a8 566c037a1021fad1805b3484e93599acb18d7e05 78.5 KB
56d0985bc5d8ac187625ce9c15a6cd9b 05af4da1e39754e9740b3d9506abf7b79d2b110a 107.31 KB
18ffccf2bddfbe915483d3b3572a337b b5a660681f9f738bffb5a46d4c634800ca37ab9c 107.32 KB
53a01fa3205c674cbfdbe120d1f60917 8ef9908cc26eaa40bf2b95f16db70dfd9afe7b61 107.31 KB
b1c035f157cb8c63f3bf952a236fc635 39c1862e73e6623e67f2fdfeed1675c8fd931f7b 107.31 KB
5a55de20d088662a704ff2735271e177 2700776c44f8f140b1bf457f00cba780767f6f97 110.38 KB
b64f1232f6fbfb6ce7fc35e1259505c6 7f36bb00a0179c1173d99e68eb76de71552d6ef6 76.98 KB
29186986fe1e2045edbac279e1651416 e0247b006dbf5307e0806faee10121b9a7598ecc 73.48 KB
00288e247202142b394e3b7b13cdf389 c5186b7736ea63e62be4ade2800d8773aca3f782 76.95 KB
4c5098ecc449484990948cf56da701c1 12afd33ba050e45ebe543da2aa359e69b23e912e 57 KB
c3defeab878f71906f95fdee83a62ee6 2afde30a11b4a419f08fa4220858bd71edaa6e24 53 KB
98258115f99905f18ed6abc8d7c16bb1 e7b0966512347e37c2c2c8a25019a297ce056ad8 53 KB
b7dc98f6f4e7611a9c0849945fb28fb9 730c3a8a676493239c4e7b3b2c555b9fe970a1b2 88.55 KB
889bec77bca63cdcdd50f591dcd63cdb 433200361e01c622ce6934dca40ac63b5cb191c0 83.27 KB
4158fbebdfc5f8e577d7191d78eb4d7a 30d6ac659213df1b7aa6b30d7e58ee5c0fa263f0 88.18 KB

Windows OS versionsDistribution by Windows OS

OS versiondistribution
Windows 7 Home Premium 42.75%
Windows 7 Ultimate 22.00%
Windows 7 Professional 8.50%
Windows 8.1 8.00%
Windows 8.1 Pro 3.00%
Windows 8 Pro 2.50%
Windows 7 Home Basic 2.25%
Microsoft Windows XP 1.75%
Windows 8 1.50%
Windows 8.1 Single Language 1.25%
Windows 8.1 Pro with Media Center 1.00%
Windows Vista Home Premium 1.00%
Windows 8.1 Pro Preview 1.00%
Windows 7 Starter 0.75%
Windows 8 Pro with Media Center 0.50%
Windows 7 Enterprise 0.50%
Windows 8 Enterprise 0.50%
Windows 8 Enterprise N 0.25%
Windows 8.1 Enterprise Evaluation 0.25%
Windows 8 Single Language 0.25%
Windows 8.1 Enterprise 0.25%
22 other Windows OS version

Distribution by countryDistribution by country

United States installs about 42.96% of IOfficeAntiVirus Module.

OEM distributionDistribution by PC manufacturer

PC Manufacturerdistribution
Dell 20.00%
ASUS 17.36%
Hewlett-Packard 15.66%
Acer 11.89%
Toshiba 9.43%
Lenovo 6.42%
Sony 5.66%
Intel 3.02%
Samsung 2.08%
Compaq 1.13%
MSI 1.13%
American Megatrends 0.94%
Gateway 0.75%
NEC 0.75%
Sahara 0.57%
Alienware 0.38%
Medion 0.38%
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