What is bmbho.dll?

Bmbho.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 SearchPerks! Follow-On Study Assistant.

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Bmbho.dll file information

The process known as SearchPerks! Follow-On Study Assistant or SearchPerks! Perk Counter belongs to software SearchPerks! Perk Counter or Search Trial Assistant or SearchPerks! Follow-On Study by Microsoft ( or Bytemobile (

Description: Bmbho.dll is not essential for Windows and will often cause problems. Bmbho.dll is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 514,424 bytes (44% of all occurrences), 514,096 bytes, 196,608 bytes or 516,504 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 C68AE9C0-0909-4DDC-B661-C1AFB9F5AE53 or A6D47028-9C03-46EE-A1F2-6D341FA2B4E9 or 2787EA8E-8D87-48af-88AD-B30246C917AB or D1A1FD57-93FC-45FE-BC2A-B3A5D47D6674. There is no information about the author of the file. The program has no visible window. You can uninstall this program in the Control Panel. It is able to monitor web browsers. There is no detailed description of this service. It is not a Windows system file. The bmbho.dll file is certified by a trustworthy company. Bmbho.dll is able to monitor applications. Therefore the technical security rating is 50% dangerous; however you should also read the user reviews.

Uninstalling this variant: You may also want to safely remove the program using the uninstall program of SearchPerks! Perk Counter or SearchPerks! Follow-On Study (Control Panel ⇒ Uninstall a Program).

Recommended: Identify bmbho.dll related errors

If bmbho.dll is located in the C:\Windows\System32 folder, the security rating is 40% dangerous. The file size is 155,648 bytes. The process can be removed using the Control Panel's Add\Remove programs applet. The program is not visible. Bmbho.dll is able to change the behavior of, or monitor Internet Explorer. The bmbho.dll file is not a Windows core file. Bmbho.dll is able to record keyboard and mouse inputs.

Uninstalling this variant: You may also want to safely remove the program using the uninstall program of Fast (Control Panel ⇒ Uninstall a Program).

External information from Tony Klein:

Important: Some malware camouflages itself as bmbho.dll. Therefore, you should check the bmbho.dll process on your PC to see if it is a threat. If SearchPerks! Follow-On Study Assistant 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 believe this file is part of an search engine trial program that I subscribed to. It allows MSN / iExplorer to track searches made using their search engine as part of the trial.
  PR - Miami  

Summary: Average user rating of bmbho.dll: based on 1 vote with 1 user comment. One user thinks it's neither essential nor dangerous.

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Best practices for resolving bmbho issues

The following programs have also been shown useful for a deeper analysis: Security Task Manager examines the active bmbho process on your computer and clearly tells you what it is doing. Malwarebytes' well-known anti-malware tool tells you if the bmbho.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 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 repairing of your installation or, for Windows 8 and later versions, executing the DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

Other processes

bmbho.dll [all]