What is AuthBHO.dll?

AuthBHO.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 Authentium Browser Helper Object.

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AuthBHO.dll file information

The process known as Authentium Browser Helper Object belongs to software Cox High Speed Internet or Cox Anti-Spyware and Pop-Up or Bresnan Security Manager or Curtains for Windows or ESP by Authentium (

Description: AuthBHO.dll is not essential for the Windows OS and causes relatively few problems. AuthBHO.dll is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 110,592 bytes (87% of all occurrences) or 118,784 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 A4D90779-6CB2-4752-83C2-A2AB4D9A672D. The program is not visible. AuthBHO.dll is able to monitor web browsers. There is no detailed description of this service. It is not a Windows core file. It is a file with no information about its developer. The program can be uninstalled in the Control Panel. AuthBHO.dll appears to be a compressed file. Therefore the technical security rating is 61% dangerous, however you should also read the user reviews.

Uninstalling this variant: In case of any problems with AuthBHO.dll, you can completely remove Cox High Speed Internet or Cox Anti-Spyware and Pop-Up (Control Panel ⇒ Uninstall a Program).

Recommended: Identify AuthBHO.dll related errors

External information from Tony Klein:

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

Anti-virus software provide to Cox High Speed Internet Users

Summary: Average user rating of AuthBHO.dll: based on 1 vote with 1 user comment. One user thinks AuthBHO.dll is essential for Windows or an installed application.

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Best practices for resolving AuthBHO issues

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

AuthBHO.dll [all]