What is mcapfbho.dll?

Mcapfbho.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 McApfBHO.

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Mcapfbho.dll file information

The process known as McApfBHO belongs to software McAfee AntiPhishing Filter BHO by McAfee (

Description: Mcapfbho.dll is not essential for the Windows OS and causes relatively few problems. Mcapfbho.dll is located in a subfolder of "C:\Program Files (x86)" (common is C:\Program Files (x86)\mcafee\spamkiller\). Known file sizes on Windows 10/8/7/XP are 262,236 bytes (66% of all occurrences) or 348,160 bytes. 
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 41D68ED8-4CFF-4115-88A6-6EBB8AF19000. The program has no visible window. Mcapfbho.dll is able to monitor web browsers. There is no detailed description of this service. The mcapfbho.dll file is not a Windows system file. Therefore the technical security rating is 66% dangerous, but you should also take into account the user reviews.

Uninstalling this variant: There is a possibility to completely remove McAfee AntiVirus Plus (Control Panel ⇒ Uninstall a Program).

Recommended: Identify mcapfbho.dll related errors

Important: Some malware camouflages itself as mcapfbho.dll, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the mcapfbho.dll process on your PC to see if it is a threat. If McApfBHO 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

This is a component of McAfee SpamKiller. This application effectively filters spam and prevents it from coming into your e-mail. It monitors POP3, MAPI, and MSN Hotmail using both rule based and list based filtering.

Summary: Average user rating of mcapfbho.dll: based on 1 vote with 1 user comment. One user thinks it's probably harmless.

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Best practices for resolving mcapfbho issues

The following programs have also been shown useful for a deeper analysis: ASecurity Task Manager examines the active mcapfbho process on your computer and clearly tells you what it is doing. Malwarebytes' well-known Banti-malware tool tells you if the mcapfbho.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

mcapfbho.dll [all]