Should I block it?

No, this file is 100% safe to run.

VersionsAdditional versions

6.1.7600.16385 (win7_rtm.090713-1255) 18.29%
6.1.7600.16385 (win7_rtm.090713-1255) 27.31%
6.1.7600.16384 (win7_rtm.090710-1945) 0.05%
4.5.0218.0 1.78%
4.5.0216.0 1.36%
4.4.0304.0 0.94%
4.4.0207.0 0.05%
4.3.9600.16384 (winblue_rtm.130821-1623) 1.21%
4.3.9600.16384 (winblue_rtm.130821-1623) 0.05%
4.3.9431.0 (winmain_bluemp.130615-1214) 0.26%
4.3.9431.0 (winmain_bluemp.130615-1214) 0.05%
4.3.0219.0 2.04%
4.3.0216.0 0.79%
4.3.0215.0 0.94%
4.3.0215.0 0.31%
4.3.0215.0 0.68%
4.2.0223.0 3.98%
4.2.0223.0 3.98%
4.2.0223.0 0.31%
4.2.0223.0 3.25%
4.2.0216.0 0.16%
4.1.0522.0 7.34%
4.0.9200.16384 (win8_rtm.120725-1247) 0.94%
4.0.9200.16384 (win8_rtm.120725-1247) 2.62%
4.0.8400.0 (winmain_win8rc.120518-1423) 0.05%
View more



IOfficeAntiVirus Module by Microsoft Corporation (Signed)

Remove MpOAV.dll
Version:   4.4.0304.0
MD5:   712d83788f21d229adfa9f1f58aa2386
SHA1:   220c0394fe050b7f468db9da527d409b3029c8a6
This is a Windows system installed file with Windows File Protection (WFP) enabled.

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
File version:4.4.0304.0
Size:112.93 KB (115,640 bytes)
Build date:10/23/2013 2:54 PM
Issued to:Microsoft Corporation
Authority (CA):Microsoft Corporation
Expiration date:Monday, March 4, 2013
Digital DNA
File packed:No
More details


The following programs will install this file
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 Windows XP, Windows Vista and Windows 7, but not on Windows 8, which has a built-in AV component. Built upon the same virus definitions and scanning engine as other Microsoft antivirus products, MSE provides real-time protection, constantly mo...
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-console monitoring solution. You can also use Endpoint Protection to configure Windows Firewall settings on computers in your enterprise. Endpoint Protection integrates with System Center 2012 Configuration Manager to provide a unified solutio...
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
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 Server) and individual devices.


IOffice antivirus plugins
  • {2781761E-28E1-4109-99FE-B9D127C57AFE}
  • {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}

Windows OS versionsDistribution by Windows OS

OS versiondistribution
Windows 7 Home Premium 42.50%
Windows 7 Ultimate 19.50%
Windows 8.1 12.00%
Windows 7 Professional 8.50%
Windows 8.1 Pro 5.00%
Windows 8.1 Single Language 2.50%
Windows 7 Home Basic 2.00%
Windows 8 Pro 1.50%
Windows 8.1 Pro with Media Center 1.50%
Windows Vista Home Premium 1.00%
Microsoft Windows XP 1.00%
Windows 8 Enterprise N 0.50%
Windows 8.1 Enterprise Evaluation 0.50%
Windows 8 Single Language 0.50%
Windows 7 Starter 0.50%
Windows 8.1 Enterprise 0.50%
Windows 8.1 Pro Preview 0.50%

Distribution by countryDistribution by country

United States installs about 49.00% of IOfficeAntiVirus Module.

OEM distributionDistribution by PC manufacturer

PC Manufacturerdistribution
ASUS 21.14%
Dell 20.33%
Hewlett-Packard 17.89%
Acer 14.63%
Toshiba 9.76%
Lenovo 5.69%
Sony 4.07%
Samsung 1.22%
Alienware 0.81%
Intel 0.81%
Compaq 0.81%
Sahara 0.41%
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