What is tbPHPN.dll?

TbPHPN.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 Conduit Toolbar.

Click to Run a Free Scan for tbPHPN.dll related errors

TbPHPN.dll file information

The process known as Conduit Toolbar belongs to software PHPNukeEN Toolbar by Conduit (

Description: TbPHPN.dll is not essential for the Windows OS and causes relatively few problems. TbPHPN.dll is located in a subfolder of "C:\Program Files". Known file sizes on Windows 10/8/7/XP are 2,515,552 bytes (28% of all occurrences), 3,863,136 bytes, 2,349,080 bytes, 2,734,688 bytes or 3,913,000 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 c9508125-4747-4733-b048-e4b82dc9716d or 2c965f3f-8efd-4bfc-a2c5-1672845fdbbf or dd02a4eb-4afd-4d60-99d8-e67f964ca813 or 1c491116-c175-45e1-a570-6fb14fea8b7b or 94ccd570-d0e1-48bd-abeb-58284ed4c242. The program has no visible window. The tbPHPN.dll file is a Verisign signed file. TbPHPN.dll is able to change the behavior of, or monitor Internet Explorer. The file is not a Windows system file. There is no detailed description of this service. It is certified by a trustworthy company. TbPHPN.dll is able to record keyboard and mouse inputs, monitor applications and manipulate other programs. Therefore the technical security rating is 49% dangerous.

Uninstalling this variant: The software publisher OurToolbar provides direct support ( You could uninstall the software PHPNukeEN Toolbar or PHPNukeDE Toolbar using the Uninstall a Program function of Windows Control Panel (Windows: Start, Settings, Control Panel, Uninstall a Program).

Recommended: Identify tbPHPN.dll related errors

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

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

tbPHPN.dll [all]