What is mscoree.dll?

Mscoree.dll is a browser extension for Internet Explorer. This add-on enables several additional functions for Internet Explorer. You can disable it through the Extras menu (key combination Alt + X) under Manage Add-ons. You can fix your mscoree.dll problem by downloading the correct mscoree.dll file. The following paragraph provides more information about Microsoft .NET Runtime Execution Engine.

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Mscoree.dll file information

The process known as Microsoft .NET Runtime Execution Engine belongs to software Microsoft .NET Framework (version 4 Client Profile, 4 Client, 4) or Microsoft Windows Operating System by Microsoft (

Description: Mscoree.dll is not essential for the Windows OS and causes relatively few problems. The mscoree.dll file is located in the C:\Windows\System32 folder. Known file sizes on Windows 8/7/XP are 297,808 bytes (46% of all occurrences), 282,112 bytes and 9 more variants. 
This .dll file is a Browser Helper Object (BHO) that runs automatically every time you start your web browser. BHOs are not stopped by personal firewalls, because they are identified by the firewall as part of the browser itself. BHOs are often used by adware and spyware. IDs used by this BHO include B0744341-96E0-4341-9ED2-8BC36CE0CCD0 or D5233FCD-D258-4903-89B8-FB1568E7413D or 85 more variants. The program has no visible window. The file is not a Windows system file. There is no detailed description of this service. The file is able to change the behavior of, or monitor Internet Explorer. It is certified by a trustworthy company. Therefore the technical security rating is 57% dangerous, however you should also read the user reviews.
If you encounter difficulties with mscoree.dll, you can uninstall Microsoft .NET Framework or Microsoft .NET Framework 4 Client Profile software via Windows Control Panel/Add or Remove Programs (Windows XP) or Programs and Features (Windows 8/7/Vista).

Recommended: Identify mscoree.dll related errors

If mscoree.dll is located in a subfolder of "C:\Program Files", the security rating is 32% dangerous. The file size is 276,248 bytes. The program can be uninstalled in the Control Panel. The program has no visible window. The mscoree.dll file is a Verisign signed file. It is able to monitor web browsers. The mscoree.dll file is certified by a trustworthy company. The service has no detailed description. It is not a Windows system file.
If you encounter difficulties with mscoree.dll, you can contact Customer Service or uninstall Ript software via Windows Control Panel/Add or Remove Programs (Windows XP) or Programs and Features (Windows 8/7/Vista).

External information from Tony Klein:

Important: Some malware disguises itself as mscoree.dll, particularly when not located in the C:\Windows\System32 folder. Therefore, you should check the mscoree.dll process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

Part of Microsoft .NET Framework
  Alex   (further information)
trixie browser extension
when i googled the registry number (starting "95663..."), I came up with a host of references to FilePrintFedExKinko's, which I do have installed on my machine. I think this may be the browser helper for that program. If you don't have the program, you probably don't need the .dll.
  Ken P   (further information)
Think it has to do with my ACT 2006
  The Major  
Arose in XP repair.
was not a part of windows 98 oe nt installation
This constant error message can be solved the right way if you go to ' '. As part of Microsoft .NET framework it's a necessary file. But malware like Uniblue/Advanced PC tweaker (out of Malta) use the error message to snag the unaware into buying their useless/potentially dangerous programs. Fair warning: just because a site claims it has 'Microsoft Approved' or other seemingly legitmate rating don't get sucked in! ANY company that plunks down enough cash seems to be able to get a 'Microsoft Approved' rating.
  Kirsten R.   (further information)
This file is part of the .NET framework. Programs that rely on .NET need this file (among others) in order to run successfully.
  Dave Wright   (further information)
Part of application for MS Outolook, possible the Doodle event scheduler, Hitman Pro and my virusscanner leave it alone
  Jan Malenstein  
started by hklm/software/classes/protocols/filter 3 times as: application/octed-stream, -/x-complus and -/x-msdownload (reported by sysinternals autoruns) on my infected system (security tool, 3-20010)
  windoom   (further information)
its to do with video
Part of .Net Runtime
Security Task Manager say is this is pontetially dangerous
It seems to be a part of TeamViewer Meeting Add-In for Outlook. if you dont need Teamviewer Meeting, you can dissable it in Teamviewer
Required for any .Net 4 applications. Not malicious.
Part of .NET

Rating chart

Summary: Average user rating of mscoree.dll: based on 22 votes with 16 user comments. 13 users think mscoree.dll is essential for Windows or an installed application. 5 users think it's neither essential nor dangerous. 4 users think mscoree.dll is dangerous and recommend removing it. 4 users don't grade mscoree.dll ("not sure about it").

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Best practices for resolving mscoree issues

A clean and tidy computer is the key requirement for avoiding problems with mscoree. This means running a scan for malware, cleaning your hard drive using cleanmgr and sfc /scannow, uninstalling programs that you no longer need, checking for Autostart programs (using msconfig) and enabling Windows' Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off doing a repair of your installation, or in the case of Windows 8, executing the DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the mscoree.dll process on your computer, the following programs have proven to be helpful: Security Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. Malwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

mscoree.dll [all]