What is SophosBHO.dll?

SophosBHO.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 Sophos Browser Helper Object.

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SophosBHO.dll file information

The process known as Sophos Browser Helper Object or Sophos Anti-Virus belongs to software Sophos Anti-Virus by Sophos Plc (

Description: SophosBHO.dll is not essential for the Windows OS and causes relatively few problems. The SophosBHO.dll file is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 240,696 bytes (56% of all occurrences), 244,776 bytes, 240,680 bytes or 246,000 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 39EA7695-B3F2-4C44-A4BC-297ADA8FD235. The program is not visible. SophosBHO.dll is a Verisign signed file. It is able to change the behavior of, or monitor Internet Explorer. The SophosBHO.dll file is certified by a trustworthy company. The service has no detailed description. SophosBHO.dll is not a Windows core file. You can uninstall this program in the Control Panel. Therefore the technical security rating is 35% dangerous.

Uninstalling this variant: If you still experience problems with SophosBHO.dll, you can go to the support area of the Sophos website, see if there is a newer version or uninstall Sophos Anti-Virus from your computer using the Control Panel applet Uninstall a Program.

Recommended: Identify SophosBHO.dll related errors

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


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Best practices for resolving SophosBHO issues

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

SophosBHO.dll [all]