What is lexbar.dll?

Lexbar.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 LexicoToolbar Module.

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Lexbar.dll file information

The process known as LexicoToolbar Module belongs to software LexicoToolbar Module by (

Description: Lexbar.dll is not essential for the Windows OS and causes relatively few problems. The lexbar.dll file is located in a subfolder of C:\Windows (mostly C:\WINDOWS\Downloaded Program Files\). The file size on Windows 10/8/7/XP is 270,336 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 11359F4A-B191-42d7-905A-594F8CF0387B. The program is not visible. It is able to monitor web browsers. The file is not a Windows system file. The service has no detailed description. Therefore the technical security rating is 60% dangerous, however you should also read the user reviews.

Recommended: Identify lexbar.dll related errors

External information from Tony Klein:

Important: Some malware camouflages itself as lexbar.dll, particularly when located in the C:\Windows or C:\Windows\System32 folder. Therefore, you should check the lexbar.dll process on your PC to see if it is a threat. If LexicoToolbar Module 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 IE toolbar installation. Allows language reference from your IE toolbar without navigating from current page. Seems more stable than Merriam Webster, however the security of this DLL is unknown at present. Classify as guarded.
  OnThePike   (further information) Toolbar  

Summary: Average user rating of lexbar.dll: based on 3 votes with 2 user comments. One user thinks lexbar.dll is essential for Windows or an installed application. One user thinks it's probably harmless. One user thinks it's neither essential nor dangerous.

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Best practices for resolving lexbar issues

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

lexbar.dll [all]