Mscoree.dll file information
The process known as Microsoft .NET Runtime Execution Engine belongs to software Microsoft .NET Framework (version 4 Client Profile) or Microsoft Windows Operating System by Microsoft (www.microsoft.com).
Description: Mscoree.dll is not essential for the Windows OS and causes relatively few problems. Mscoree.dll is located in the C:\Windows\System32 folder.
Known file sizes on Windows 10/11/7 are 297,808 bytes (72% of all occurrences), 282,112 bytes and 14 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 2e250b90-0e7a-42a3-9d65-e39f9f227fa4 or 0bc6e3fa-78ef-4886-842c-5a1258c4455a or 53 more variants.
The program has no visible window. The mscoree.dll 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. The mscoree.dll file is digitally signed.
Therefore the technical security rating is 44% dangerous; but you should also compare this rating with the user reviews.
Uninstalling this variant:
If you want to remove the program completely, go to
Control Panel ⇒ Software ⇒
Microsoft .NET Framework 4 Client Profile or
Microsoft .NET Framework 4.
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 file is not a Windows core file. The service has no detailed description. The program is not visible. Mscoree.dll is a Verisign signed file. The mscoree.dll file is certified by a trustworthy company. Mscoree.dll is able to change the behavior of, or monitor Internet Explorer. The software can be uninstalled in the Control Panel.
External information from Tony Klein:
- This legitimate BHO (mscoree.dll) is related to ACT! 2005
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. If Microsoft .NET Runtime Execution Engine has changed your browser's search engine and start page, you can recover your browser's default settings as follows:
Reset default browser settings for
Internet-Explorer ▾
- In Internet Explorer, press the key combination Alt + X to open the Tools menu.
- Click Internet options.
- Click the Advanced tab.
- Click the Reset... button.
- Enable the Delete personal settings option.
This will reset your Internet Explorer to its default settings. Your browser will start with the familiar start page and search engine—without popups, ads, cookies, but all browser add-ons are deleted too
[1].
Make cleaning up your browser and your computer simpler and safer with
Security Task Manager.
- Copy chrome://settings/resetProfileSettings into your Chrome browser's address bar.
- Click Reset.
Chrome will then restart with an empty start page and with Google as the default search engine—without any popups, ads, cookies, themes or extensions
[1].
If you want to re-enable some extensions, please enter
chrome://extensions/ into your Chrome browser's address bar.
Make cleaning up your browser and your computer simpler and safer with
Security Task Manager.
- Copy about:support into your Firefox browser's address bar.
- Click Refresh Firefox.
Firefox now looks brand new. Bookmarks and saved passwords are retained, but all browser extensions and their related data are deleted
[1].
Make cleaning up your browser and your computer simpler and safer with
Security Task Manager.
Best practices for resolving mscoree issues
The following programs have also been shown useful for a deeper analysis: ASecurity Task Manager examines the active mscoree process on your computer and clearly tells you what it is doing. A good Bantivirus tool detects whether the mscoree.dll file on your PC might be malware slowing down your system. Such unwanted programs are often not classified as viruses by other antivirus software and therefore go undetected.
A clean and tidy computer is the key requirement for avoiding PC trouble. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic 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 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.
To restore the original performance and remove unnecessary programs, you can 8reset your PC. Your personal files will remain intact, but any programs you installed will need to be reinstalled.
Other processes
w2pbrowser.dll startupcheckingservice.exe scripthost.dll mscoree.dll nmsaccessu.exe muachost.exe alg.exe fastdialhost.dll fabs.exe protectwindowsmanager.exe phoneexperiencehost.exe [all]
Score
User Comments
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Summary: Average user rating of mscoree.dll: based on 26 votes with 19 user comments. 15 users think mscoree.dll is essential for Windows or an installed application. One user thinks it's probably harmless. 6 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").