What is mcieplg.dll?

Mcieplg.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. The following paragraph provides more information about SiteAdvisor.

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Mcieplg.dll file information

The process known as SiteAdvisor or WebAdvisor

belongs to software McAfee SiteAdvisor or McAfee SecurityCenter or McAfee Total Protection or McAfee WebAdvisor or McAfee Internet Security or McAfee Virtual Technician or McAfee SiteAdvisor Enterprise or McAfee AntiVirus Plus

by McAfee (

Description: Mcieplg.dll is not essential for the Windows OS and causes relatively few problems. The file mcieplg.dll is located in a subfolder of "C:\Program Files" or sometimes in a subfolder of the user's profile folder. Known file sizes on Windows 10/8/7/XP are 150,032 bytes (10% of all occurrences), 262,080 bytes and 26 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 B164E929-A1B6-4A06-B104-2CD0E90A88FF. The program is not visible. It is able to monitor web browsers. There is no detailed description of this service. It is not a Windows core file. It is a Verisign signed file. The file is digitally signed. Mcieplg.dll is able to record keyboard and mouse inputs and monitor applications. Therefore the technical security rating is 47% dangerous, however you should also read the user reviews.

Uninstalling this variant: It is possible to uninstall McAfee SiteAdvisor or McAfee, Inc. software via Windows Control Panel/Add or Remove Programs (Windows XP) or Programs and Features (Windows 10/8/7) or search the support area on the Siteadvisor website.

Recommended: Identify mcieplg.dll related errors

Important: Some malware camouflages itself as mcieplg.dll, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the mcieplg.dll process on your PC to see if it is a threat. If SiteAdvisor 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 ▾
  1. In Internet Explorer, press the key combination Alt + X to open the Tools menu.
  2. Click Internet options.
  3. Click the Advanced tab.
  4. Click the Reset... button.
  5. 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.


User Comments

I have had major issues here.This Has rocked my security platform sideways. Dont be fooled by results they are not true in my case.
This is part of Mcafee and is not dangerous.
  Montekristo   (further information)

Summary: Average user rating of mcieplg.dll: based on 5 votes with 2 user comments. 4 users think mcieplg.dll is essential for Windows or an installed application. One user thinks it's neither essential nor dangerous. One user is not sure about it.

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Best practices for resolving mcieplg issues

The following programs have also been shown useful for a deeper analysis: ASecurity Task Manager examines the active mcieplg process on your computer and clearly tells you what it is doing. Malwarebytes' well-known Banti-malware tool tells you if the mcieplg.dll on your computer displays annoying ads, slowing it down. This type of unwanted adware program is not considered by some antivirus software to be a virus and is therefore not marked for cleanup.

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, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

Other processes

mcieplg.dll [all]