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What is mpshhook.dll?

Part of Windows Defender by Microsoft

What is it?

Shell Execution Monitor allows for right clicking and scanning a file for malware in Windows Explorer. 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.

What if I disable Windows Defender?

If this is disabled then Microsoft Malware Protection will not be able to protect Microsoft Office from malware and other viruses. Keeping this enabled is recommended.
Description of mpshhook.dll from Microsoft
Windows Defender is a free program that helps you stay productive by protecting your computer against pop-ups, slow performance and security threats caused by spyware and other potentially unwanted software. Windows Defender provides real-time protection for your home or small business PC that guards against viruses, spyware, and other malicious software. Windows Defender is a free* download from Microsoft that is simple to install, easy to use, and is automatically updated to protect your PC with the latest technology. Microsoft Security Essentials runs quietly and efficiently in the background so that you are free to use your Windows-based PC the way you want—without interruptions or long computer wait times. Windows Defender is able to detect and remove more threats posed by spyware and other potentially unwanted software. Real Time Protection has also been enhanced to better monitor key points in the operating system for changes.
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How is mpshhook.dll loaded?

Shell execute hook - mpshhook.dll has a CLSID (globally unique identifier) of {091EB208-39DD-417D-A5DD-7E2C2D8FB9CB}. Shell execute hook are applications that extend the set of strings that can be executed by Windows. For example, Internet Explorer used a shell execute hook so that you could type http://www.microsoft.com/ into the Run dialog and invoke the Web browser.


What is the community is seeing?What is the community is doing?
About 0.2% of all Boost users have the mpshhook.dll file.Of the 0.2% of mpshhook.dll users, 25.0% have disabled it.
Typical file (disk image) location:
C:\Program Files\windows defender\mpshhook.dll

What else is related?

What Windows OS versions does this run on?

Windows XP Home Edition (5.1.2600.131072)
Microsoft Windows XP (5.1.2600.196608)
Microsoft Windows XP Home Edition (5.1.2600.196608)
Windows XP Home Edition (5.1.2600.196608)
Windows XP Professional (5.1.2600.196608)
Windows Vista (TM) Home Premium (6.0.6001.65536)
Windows 7 Home Premium (6.1.7601.65536)
Windows 7 Home Premium (6.1.7601.65536)

About Microsoft Corporation

Microsoft, founded in 1975 by Bill Gates and Paul Allen, is a veteran software company, best known for its Microsoft Windows operating system and the Microsoft More...
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File details

File name: mpshhook.dll
Publisher: Microsoft Corporation (verified)
Name: Windows Defender
Description: Shell Execution Monitor
Version: 1.1.1593.0
Size: 81.27 KB
Original file name: MpShHook.dll

Digital certificate

Certificate authority: Microsoft Corporation
Effective date: 4/4/2006
Expiration date: 10/4/2007

Shell execute hook details

CLSID: {091EB208-39DD-417D-A5DD-7E2C2D8FB9CB}

Image hashes

MD5: f9d82b82f1b7c0b2d2606a987073f58c
SHA-1: ae8ee0c9a2421ae36f49447dcc81cf6f7a24abb7
SHA-256: 78db49d7b905c32c5ca7a8e73aafe75d2f3acdd9d5e65b0d196b532f2881e80a

PE image details

File entropy: 6.49361
File packed: No
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