What is _mwoltb.dll?

_mwoltb.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 MWOLTB Module.

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_mwoltb.dll file information

The process known as MWOLTB Module belongs to software Merriam-Webster Online Toolbar by unknown.

Description: _mwoltb.dll is not essential for the Windows OS and causes relatively few problems. _mwoltb.dll is located in the C:\Windows folder. The file size on Windows 10/8/7/XP is 385,024 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 5ADA9CAC-04F9-4DD2-ABFD-74D673BE8624. There is no description of the program. The program is not visible. _mwoltb.dll is an unknown file in the Windows folder. The file is able to monitor web browsers. The service has no detailed description. _mwoltb.dll is not a Windows system file. Therefore the technical security rating is 76% dangerous; however you should also read the user reviews.

Uninstalling this variant: If problems with Merriam-Webster Online Toolbar occur, you can also remove the entire program using Windows Control Panel.

Recommended: Identify _mwoltb.dll related errors

External information from Tony Klein:

Important: Some malware camouflages itself as _mwoltb.dll. Therefore, you should check the _mwoltb.dll process on your PC to see if it is a threat. If MWOLTB 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

Has been installed by Merriam Webster Toolbar, interact with browser, don't seem to hiddenly disclose any information.
  Romolo   (further information)
Believe it to be from a reliable source
  Archie McDowall  
Belongs to an online dictionary toolbar. Its handy
allows Merriam-Webster Online toolbar to be added to the toolbar list in Internet Explorer. Checked this by not allowing _mwoltb.dll to run. My Spyware Terminator freeware application detected it when starting IE.
  Ron Loewenbein  
Installed as part of the Merriam-Webster Online Toolbar. Seems harmless.
  Nanashi   (further information)

Summary: Average user rating of _mwoltb.dll: based on 5 votes with 5 user comments. 3 users think _mwoltb.dll is essential for Windows or an installed application. 2 users think it's neither essential nor dangerous. One user is not sure about it.

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Best practices for resolving _mwoltb issues

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

_mwoltb.dll [all]