What is msntb.dll?

Msntb.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 Windows Live Toolbar.

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Msntb.dll file information

The process known as Windows Live Toolbar for Internet Explorer or MSN Toolbar extension or MSN Search Toolbar extension belongs to software Windows Live Toolbar or MSN Toolbar or MSN Search Toolbar by Microsoft (

Description: Msntb.dll is not essential for Windows and will often cause problems. The file msntb.dll is located in a subfolder of "C:\Program Files (x86)" (generally C:\Program Files (x86)\Windows Live Toolbar\ or C:\Program Files (x86)\MSN Apps\MSN Toolbar\MSN Toolbar\01.02.5000.1021\en-us\). Known file sizes on Windows 10/8/7/XP are 546,672 bytes (38% of all occurrences), 546,320 bytes and 4 more variants. 
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 BDBD1DAD-C946-4A17-ADC1-64B5B4FF55D0. The program is not visible. Msntb.dll is able to change the behavior of, or monitor Internet Explorer. There is no detailed description of this service. The msntb.dll file is not a Windows core file. It is certified by a trustworthy company. You can uninstall this program in the Control Panel. Msntb.dll is able to record keyboard and mouse inputs and monitor applications. Therefore the technical security rating is 52% dangerous; but you should also compare this rating with the user reviews.

Uninstalling this variant: There is a possibility to do the following:
  1) uninstall the software Windows Live Toolbar using the Uninstall a Program function of Windows Control Panel (Windows: Start, Settings, Control Panel, Uninstall a Program)
  2) use the software publisher’s support
  3) find out if there is a newer version available.

Recommended: Identify msntb.dll related errors

External information from Tony Klein:

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


User Comments

If not dangerous, A Waste Of System Resources (plug-in/active-x)
window live
When I try fullscreen in youtube, the system pop-up an error message then close all opened browser windows. I just renamed the msntb.dll file to msntb.dl_ (to keep in the folder) and fix the problem with the youtube fullscreen mode. The rest of the system seems to be working perfectly.
Remove Panda Titanium
If it was dangerous it would be listed among st virii, spyware and adware
  Neal (logic pc person)  

  tahir   (further information)

  tahir   (further information)
More comments can be found here:
    (further information)

Rating chart

Summary: Average user rating of msntb.dll: based on 76 votes with 9 reviews. 35 users think msntb.dll is essential for Windows or an installed application. 5 users think it's probably harmless. 11 users think it's neither essential nor dangerous. 8 users suspect danger. 17 users think msntb.dll is dangerous and recommend removing it. 9 users don't grade msntb.dll ("not sure about it").

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Best practices for resolving msntb issues

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

msntb.dll [all]